查询词典 I. E.

When did the world come into existence , i.e.

世界是什么时候产生的？

We plan to commission the study on AQO in early 2007 and we expect it will take about 18 months to complete, i.e.

我们计划於2007年年初委托顾问进行全面的研究以助检讨本港空气质素指标。

Focusing on Melville's Typee (1846), Moby-Dick (1851), and The Confidence-Man (1857) and Morrison's Sula (1973), Beloved (1987), Jazz (1992), and Paradise (1998), the class will address their common concerns with issues of gender, race, language, and nationhood. Be prepared to read deeply i.e.

除了上课重点放在梅尔维尔的《泰皮》(1846)、《白鲸记》(1851)《大骗子》（朱注：国内藏书，另有一译名为《骗子的化装表演》）(1857)，以及摩里森的《苏拉》(1973)、《宠儿》（1987）、《爵士乐》（1992）、《乐园》（1997）这几本著作上之外，这门课也将着重这几书共同关心的主题：性别、种族、语言、民族主义。

It is not unknown for the spiders of this genus to live communally when territory, i.e. number of holes per tree, is limited.

该属蜘蛛的领地内的共存数量不难知道，就是说每棵树上的树洞数是有限的。

The park area lies in the communications center of the development zone of economy surrounding Bohai and it locates at the core zone of Tianjin Binhai New Area; it is only separated from the Tianjin Economic-Technological Development Area by a river and it is near to the Tianjin Environmental City; the distance between park area and the central urban area of Tianjin is 50 kilometers and the distance to Beijing is 120 kilometers; the distance between the park area and Tianjin Binhai International Airport is 40 kilometers and the distance to Tianjin Harbor is 21 kilometers and 35 kilometers to Caofei Dian Harbor; the traffic around it is very convenient and there are more than ten highways passing through it, i.e.

园区位于环渤海经济发展带之要冲，地处天津滨海新区核心地带，与天津经济技术开发区仅一河之隔，毗邻中新天津生态城；园区距天津中心城区50公里，距北京120公里，距天津滨海国际机场40公里，距天津港21公里，距曹妃甸港35公里，周边交通便利，京津城际铁路、京秦客运专线、津滨轻轨和京津塘高速、京津高速、唐津高速、海滨大道、津滨高速等十余条高速公路环城而过，特别是津汉快速路、塘汉快速路和京山铁路直达园区，使园区内外沟通快捷方便。

Only in the limit of large N and low excitation condition, i. e. in low density region, the exciton operators can satisfy the normal bosonic commutation relation.

而在大N极限下和低激发的情况下，即低密度情况下，激子算符满足通常的玻色对易关系。

An important problem of calculus of variations used in constrained differential systems, i.e., the commutation relation of differential operator and variational oprerator, is investigated by means of Frobenius theorem of integrability.

利用Frobenius可积性定理，研究微分约束系统一个重要的变分法问题：微分运算与变分运算的对易关系。

As compared with the existing work in this field, the results given in this paper is simple, and suitable for any robotic manipulators with unknown dynamics nonlinearities.(3) The proposed control scheme excludes the assumption that is often used in the existing literature, i.e., the robot states are assumed to be within a compact set.

与现有方法比较，本文给出的结果比较简单，适合于任何动力学非线性未知机械手的控制；提出的设计方法，克服了现有机械手神经网络控制应用中所需要的假设条件，即假设机械手的状态量严格位于某一紧集中。

The ultrastructural changes during the development of sieve element companion cell complex (SE/CC complex) in Populus deltoides were investigated using electronic microscopy. The result showed that SE and CC tome from the same secondary phloem mother cell. The development of sieve element went through three stages, i. e. immature, mature, and degenerate stage. In immature stages the sieve element presented radial expansion, cell wall thickening, and production of sieve plastid and P-protein. The cytoplasma selectivly autolysed in mature stage. At the same time, karyoplasm was dispersed, and nuclear envelope was not clear, or karyoplasm was disorgnized, and nuclear envelope was clear. The karyopalsm finally turned into P-protein. In degenerate stage, the cytoplasm completely disappeared, and the function was lost.

利用电镜技术研究美洲黑杨次生韧皮部筛管和伴胞发育过程中细胞超微结构的动态变化，观察到筛管和伴胞由同一个次生韧皮部衍生细胞分裂分化形成筛管约发育历经未成熟期、成熟期和衰退期的变化未成熟期筛管分子表现为细胞的径向扩展、壁的增厚、筛管质体和P-蛋白质的产生；成熟期筛管分子细胞组分发生选择性自溶，细胞核核质弥散状，核膜不清晰，或核膜清晰而核物质降解，最后细胞核完全解体转化为P-蛋白质类的物质；衰退期筛管分子细胞质完全解体消失，失去功能。

A comparable function can be defined in terms of the digital transfer function using the polar variable z by defining HH = HH (1/z) which gives the magnitude-squared frequency response when evaluated around the unit circle, i.e., z = ejw.

解析复杂值函数的复变S是定义在此背景下，逼近抵达中的F ，结果是一个解析函数法郎的因子F款，这是理想的过滤器传递函数在矩形的变数。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。