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The theory that groups of organisms change with passage of time,mainly as a result of natural selection,so that descendant s differ morphologically and physiologically from their ancestors.

进化论主要由于自然选择的结果，生物体群经历了阶段性的变化，使后代在形态和生理上都与它们的祖先有所不同的理论

The theory that groups of organisms change with passage of time, mainly as a result of natural selection, so that descendants differ morphologically and physiologically from their ancestors.

进化论：主要由于自然选择的结果，生物体群经历了阶段性的变化，使后代在形态和生理上都与它们的祖先有所不同的理论

Soil-microorganisms system in two sites along Mosel river was chosen as typical soil-microorganisms system because the soil was highly polluted by PAHs and microorganisms were the majority of organisms.

土壤—微生物系统选择受PAHs污染严重且微生物为优势生物的Mosel河流沿岸土壤—微生物系统为例，研究结果发现，Temmels土壤添加的D_(10)-PA被很快释放，并被本土微生物迅速降解，在2周时间内降解了约92%，并在4周内降解了约99%，以后基本保持稳定。

Motile organisms may also be negatively chemotactic, swimming away from concentrations of toxic chemicals.

可以游动的生物体也有负向的趋化现象，总是远离有害的化学物质。

Cell proliferation and differentiation are fundamental processes in the development of multicellular organisms.

中文摘要细胞周期和分化是发育过程中紧密联系、高度协调的两个过程。

Kinesin is plentiful in various kinds of cells, different stages of cell development and multicellular organisms.

它是由两条120KDa的重链和两条70KDa的轻链构成的四聚体。

Mutualistic interactions have been central to number of important steps in the evolution of multicellular organisms.

互利 共生的相互作用在多细胞动物进化过程的一些关键阶段中起着中心作用。

In multicellular organisms cells become specialized for different functions; this is called differentiation.

在多细胞的生物体中，细胞为了执行不同的功能渐渐专门化起来，这个过程叫做分化。

The approximately 175,000 species of fungi include some of the simplest multicellular organisms.

包括最简单的多细胞生物在内，真菌大概有175，000种。

If organisms are to be multicellular, cells must be able to talk to each other.

单细胞生物要进化成多细胞生物，其前提条件是细胞间必须能够互相沟通。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。