生物-社会的

Populations may be expanding or contracting because of changes in environmental conditions or because of changes to their biotic environment.

由于周围环境的变化或生物因子的影响，种群可能会增长或收缩。

A good source of biotin, avocados help to prevent dry skin and brittle hair and nails.

作为一种生物素的重要来源，鳄梨可以防止皮肤干燥，头发与指甲的开裂。

He was one of the first scientists to successfully track the migratory patterns of the bison.

他是最早追踪野牛迁徙习性的科学家之一，还是维持生物多样性的坚决拥护者。

It is an important biological agent to control cotton bollworm in the cotton field by parasitizing rate at 22.9%.

其寄主范围非常广泛，该蜂对棉铃虫各世代的平均寄生率可达22.9 %，是棉铃虫田间生物控制的重要因子。

Their bioactivities have been tested also in the laboratory, finding that some new compounds inhibited Botrytis Cinerea effectively.

同时对系列异恶唑啉类新化合物进行了实验室内植物生物活性的测试，发现了对植物灰霉病有效的新化合物。

With the development of biotechnology, molecular breeding has become an important direction in maize breeding.

随着生物技术的发展，分子育种已经成为玉米育种的重要研究方向。

Sea buckthorn is a known source of biologically active chemicals and is used in Tibet, Mongolia, China and Russia for health drinks and various cosmetics.

沙棘是一种已知的来源，具有生物活性的化学品和使用，在西藏，蒙古，中国和俄罗斯为健康饮料和各种化妆品。

It was in accordance with the situation of southwest of China that used calcium oxide as the solid catalyst in the reaction of biodiesel synthesis.

结论］氧化钙作为生产生物柴油的固体催化剂符合我国西南地区的基本情况。

PROF.: Let's talk about the Cambrian explosion,"biology's big bang."

我们今天讨论的话题是寒武纪大爆炸，也是"生物世界的大爆炸。"

A series of enzymes including acetyl_CoA carboxylase, fatty acid synthetase, fatty acid desaturase, and fatty acid elongase are involved.

近年来，随着对脂肪酸生物功能的深入了解和工业应用的增加，一些脂肪酸，特别是一些多聚不饱和脂肪酸已成为高值物质。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。