可保持的

Numerical results show that such a structure can produce multiple transmission channels, and each channel can be tuned independently.

数值计算结果表明，该结构的带隙中可产生多个透射通道，任意一个通道的频率可被独立调节而其他通道的频率均保持不变。

In the process of root cutting, the root accumulated a lot of soluble sugar and soluble protein, which provided material and energy for the cell differentiation. As root differentiating, soluable protein was continuously used up. During 10 to 20 days, the content of soluble sugar and soluble protein in the basipetal top and end of rootkept comparatively stable, then declined as adventitious buds and roots growing. 40 days later, they kept invariable, because the newly formed bud can photosynthesize and the newly formed root can absorb nutrient from outside. The dynamic balances of endogenous hormone regulate adventitious buds and roots of the root. During callus growing and adventitious bud differentiating.

上部根段在细胞分化前期积累了大量的可溶性糖，为后期的分化提供能源物质，同时积累了大量的可溶性蛋白质，为愈伤组织的产生提供能源，而后随着分化，可溶性蛋白质不断被消耗。10～20d根段上部及下部的可溶性糖、可溶性蛋白质含量保持在相对稳定的水平变化不大，后期随着不定芽及不定根的生长下降较快。40d后，新形成的芽已经能够进行光合作用，新形成的根也可从外界吸收营养物质，可溶性糖、可溶性蛋白质含量基本保持不变。

By Percoll fluid and density gradient centrifugation,the MSC was obtained;after the cells filled the bottom of vessel,subcultured them,when they subculture in third generation ,redigested them,500 R/min centrifugate,alter the

经percoll液密度梯度离心法能获得纯度较高的人骨髓间充质干细胞，这种细胞在体外培养体系中保持旺盛的增殖能力；经轻度离心和化学限定培养基法可诱导骨髓间充质干细胞向成软骨方向分化，增殖旺盛，可传一代培养，是软骨组织工程理想的种子细胞。

MSC can be obtained by percoll fluid and density gradient centrifugation, this cells kept proliferation and differentiation ability in vitro; MSC can differentiate into chondroblast by lightly centrifugation and chemical definition medium, after one generation, the differential cells kept the phentype of chondroblast, they are a kind of ideal seed-cells for cartilage tissue engineering.

经percoll液密度梯度离心法能获得纯度较高的人骨髓间充质干细胞，这种细胞在体外培养体系中保持旺盛的增殖能力；经轻度离心和化学限定培养基法可诱导骨髓间充质干细胞向成软骨方向分化，增殖旺盛，可传一代培养，是软骨组织工程理想的种子细胞。

PE stretched film/twisted film, is also called LLDPE flexibility film/packaging film, is a kind of polyethylene plastic film which is transparent, flexibility and intensity, as well as nonpoisonous and hurtless soft, has met the standard of international environment protection, under the condition of no-heating, can do cold stretching vertically and horizontally, and pack kinds of products depending on its self-stickiness, moreover, makes the packed goods keep tense and not loose in a long term, and wraps all goods as the integer tightening with its high intensity and large flexibility force.

欢迎订购！PE拉伸膜/缠绕膜，又称LLDPE弹性膜/包装膜，是一种透明、富有弹性及强度且无毒无害的柔软聚乙烯塑料薄膜，符合国际环保卫生标准，可在不加热的情况下，进行纵横双向冷拉伸，依靠它本身自粘性包装各种产品，并可使货物长期保持张力而不至于松散，强度高、弹性拉力大、对任何形状的物品都能裹紧，裹成一个整体。

PE stretched film/twisted film, is also called LLDPE flexibility film/packaging film, is a kind of polyethylene plastic film which is transparent, flexibility and intensity, as well as nonpoisonous and hurtless soft, has met the standard of international environment protection, under the condition of no-heating, can do cold stretching vertically and horizontally, and pack kinds of products depending on its self-stickiness, moreover, makes the packed goods keep tense and not loose in a long term, and wraps all goods as the integer tightening with its high intensity and large flexibility force.

PE/LLDPE 拉伸膜/缠绕膜，又称LLDPE弹性膜/包装膜，是一种透明、富有弹性及强度且无毒无害的柔软聚乙烯塑料薄膜，符合国际环保卫生标准，可在不加热的情况下，进行纵横双向冷拉伸，依靠它本身自粘性包装各种产品，并可使货物长期保持张力而不至于松散，强度高、弹性拉力大、对任何形状的物品都能裹紧，裹成一个整体。

PE stretched film/twisted film, is also called LLDPE flexibility film/packaging film, is a kind of polyethylene plastic film which is transparent, flexibility and intensity, as well as nonpoisonous and hurtless soft, has met the standard of international environment protection, under the condition of no-heating, can do cold stretching vertically and horizontally, and pack kinds of products depending on its self-stickiness, moreover, makes the packed goods keep tense and not loose in a long term, and wraps all goods as the integer tightening with its high intensity and large flexibility force.

产品说明： PE拉伸膜/缠绕膜，又称LLDPE弹性膜/包装膜，是一种透明、富有弹性及强度且无毒无害的柔软聚乙烯塑胶薄膜，符合国际环保卫生标准，可在不加热的情况下，进行纵横双向冷拉伸，依靠它本身自粘性包装各种产品，并可使货物长期保持张力而不至於松散，强度高、弹性拉力大、对任何形状的物品都能裹紧，裹成一个整体。

PE stretched film/twisted film, is also called LLDPE flexibility film/packaging film, is a kind of polyethylene plastic film which is transparent, flexibility and intensity, as well as nonpoisonous and hurtless soft, has met the standard of international environment protection, under the condition of no-heating, can do cold stretching vertically and horizontally, and pack kinds of products depending on its self-stickiness, moreover, makes the packed goods keep tense and not loose in a long term, and wraps all goods as the integer tightening with its high intensity and large flexibility force.

详细描述 PE拉伸膜/缠绕膜，又称LLDPE弹性膜/包装膜，是一种透明、富有弹性及强度且无毒无害的柔软聚乙烯塑料薄膜，符合国际环保卫生标准，可在不加热的情况下，进行纵横双向冷拉伸，依靠它本身自粘性包装各种产品，并可使货物长期保持张力而不至于松散，强度高、弹性拉力大、对任何形状的物品都能裹紧，裹成一个整体。

PE stretched film/twisted film, is also called LLDPE flexibility film/packaging film, is a kind of polyethylene plastic film which is transparent, flexibility and intensity, as well as nonpoisonous and hurtless soft, has met the standard of international environment protection, under the condition of no-heating, can do cold stretching vertically and horizontally, and pack kinds of products depending on its self

产品说明： PE拉伸膜/缠绕膜，又称LLDPE弹性膜/包装膜，是一种透明、富有弹性及强度且无毒无害的柔软聚乙烯塑料薄膜，符合国际环保卫生标准，可在不加热的情况下，进行纵横双向冷拉伸，依靠它本身自粘性包装各种产品，并可使货物长期保持张力而不至于松散，强度高、弹性拉力大、对任何形状的物品都能裹紧，裹成一个整体。

PE stretched film/twisted film, is also called LLDPE flexibility film/packaging film, is a kind of polyethylene plastic film which is transparent, flexibility and intensity, as well as nonpoisonous and hurtless soft, has met the standard of international environment protection, under the condition of no-heating, can do cold stretching vertically and horizontally, and pack kinds of products depending on its self-stickiness, moreover, makes the packed goods keep tense and not loose in a long term, and wraps all goods as the integer tightening with its high intensity and large flexibility force.

产品说明： PE/LLDPE缠绕膜/拉伸膜/裹包膜/自粘膜/包装膜/捆扎膜，又称 LLDPE 弹性膜/包装膜，是一种透明、富有弹性及强度且无毒无害的柔软聚乙烯塑料薄膜，符合国际环保卫生标准，可在不加热的情况下，进行纵横双向冷拉伸，依靠它本身自粘性包装各种产品，并可使货物长期保持张力而不至于松散，强度高、弹性拉力大、对任何形状的物品都能裹紧，裹成一个整体。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。