长链似乎降低了细胞的下沉速率，有助于硅藻生活在理化条件都比较适合生长的水体上层。

Longer chains affect sinking rates and thus likely help the diatom remain suspended in the upper part of the water column where physical and chemical parameters are more favorable for growth.

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以小麦粉为原料，对小麦粉中醇溶蛋白的提取条件及一些理化性质进行了研究。

Taking wheat flour as raw material, the conditions for extraction of gliadin from wheat flour and some physic-chemical properties were studied.

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根据我国蜂蜜产品的自然、地理条件规定理化品质要求；

Requirements for physical and chemical quality are specified in accordance with natural and geographic conditions for honey production in China.

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That tells you something about the physical chemistry of the molecule; that it's these hydrogen bonds that hold the double strands and I can break those down under certain conditions.

我们从中可以知道一些,DNA分子的理化特点,双链是由氢键连接在一起,在一定条件下这些氢键可以断裂

耶鲁公开课 - 生物医学工程探索课程节选