不能合成的

The marine microalga Porphyridium cruentum attracts increasing interest for it contains many valuable compounds such as phycoerythrin, sulfated exopolysaccharides and polyunsaturated fatty acids that are applied in the food and pharmaceutical industries.

紫球藻是属于红藻门的一种海洋微藻，在生长过程中能合成硫酸多糖、多不饱和脂肪酸、藻胆蛋白等生理活性物质。

Though one may be overpowered ,two can defend themselves.A sord of three stan

有人攻胜者孤身一人若有二人便能敌挡他三股合成的绳子不容易折断。

The company is mainly engaged in the research, development, production and marketing of carbamido chemicals. The working mechanism of the chemicals is to prevent insects from exuviations in a normal state so as to kill them.

其杀虫机理是抑制昆虫体内几丁质合成，使昆虫不能正常蜕皮而死亡，达到综合防治的目的，残效期长，无残留，使用安全。

Calcium is an important element in the body, but we only incept it from outside instead of synthesizing it by ourselves.

钙是人体的常量元素，只能靠外界摄取，而不能自身合成。

Significant differences in mycelial growth,fresh weight and osmotic sensitivity were observed in sensitive and high resistant isolates.

其主要作用机理是破坏和阻止病菌细胞膜重要组成成分麦角甾醇的生物合成，导致细胞膜不能形成，使病菌死亡。

The experimental results shows, if the ratio between MS-1 and OP-10 rangs from 1:1 to 3:l,and the total dosage of them is about 20% of Octamethylcyclotetrasiloxane (D4 ) in quality, we can obtain a kind of stable seeded emulsion of organic silicone modified acrylic ester emulsion. At the same time, if the ratio between MS-1 and Tetramethylammonium Chlorideis l:1.7,the total dosage is about 50% of D4 in quality; the ratio between MS-1 and Cetyltrimethylammonium Chlorineis 7:1, the total dosage is about 25% of D4 in quality,we can also obtain stable seeded emulsions. But if the complex emulsifier system is made of TMAC and OP-10, MS-1 and Peregal O or CTAC and Span-80, we can not synthesize any kind of satisfactory seeded emulsions.

实验结果表明：当MS-1与OP-10的质量比为1：1～3：1，总用量为八甲基环四硅氧烷(D_4)的20％左右时，可合成稳定性良好的硅丙种子乳液；MS-1与四甲基氯化铵的质量比为1：1.7，总用量为D_4的50％左右，MS-1与十六烷基三甲基氯化铵的质量比为7：1，总用量为D_4的25％左右时，亦能得到稳定的硅丙种子乳液；而TMAC与OP-10、MS-1与Peregal O以及CTAC与Span-80的复合体系作为乳化剂时均不能得到满意的硅丙种子乳液。

The results showed that the composite could not be obtained by simple mixing of two synthesized gels.

实验结果表明，简单将两种分子筛的合成凝胶混合不能得到复合材料。

There are 20 kinds of amino acid, among them, 10 kinds are necessities which can not be synthesized by animal bodies, and must be obtained from fodders; lysine is the most important in the 10 kinds of amino acid.

氨基酸有20种，有十种为必须氨基酸，动物体内不能自行合成，需从饲料中获得，赖氨酸就是其中最重要的一种。

D. Harvest收获: Standards require that containers, bins, and packaging materials must not contain synthetic fungicides, preservatives, or fumigants.

标准要求容器、储存库和包装材料均不能含有合成的杀真菌剂、防腐剂或熏蒸剂。

In human cells, tetracycline does not accumulate enough to hinder protein synthesis.

在人类细胞里，四环素不能堆积到足够程度来阻碍蛋白质的合成。

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。