又称单纯扩散,被动运送。指的是通过滤过、渗透、简单扩散和易化扩散（需要载体）等几种形式，将消化了的营养物质吸收进入血液和淋巴系统。介绍被动吸收定义、吸汞屏产品介绍、被动吸收与主动吸收的差别。
药物在肠道的吸收呈现一级吸收动力学，吸收机制为被动吸收。
The results indicated that the absorption of carbamazepine complied with the passive transport mechanism and the first order kinetics.
氯化物大多通过近端小管被动吸收，但它在TALH和DCT中主动转运。
Chloride is passively absorbed along most of the proximal tubule but is actively transported in the TALH and the DCT.
一些公司被动的使用twitter，吸收Twitterverse里的观点，同时把它们作为公司角色的因素。
Some companies use Twitter passively, absorbing what is said in the Twitterverse and factoring it into their decisionmaking.
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