Once thought to be a passive carrier of genetic information, RNA now is understood to perform a number of other vital roles in the cell, and its malfunction can lead to disease. RNA曾被视为遗传信息的载体,现在发现在细胞中它还扮演着许多其他至关重要的角色,而且它的异常会导致疾病的出现。
The mechanisms across the BBB involve the passive diffusion, the carrier mediated transport, the receptor mediated endocytosis, the absorptive mediated endocytosis ( transcytosis) and the inhibition of drug efflux from the CNS. 穿透机制包括被动转运、载体介导的转运、受体介导的转运、吸收介导的转运和外排泵活性的抑制。
Active Networks, unlike the traditional networks are not just passive carrier of bits but instead provides the capability for the user to inject customized programs into the networks. 主动网络不像传统网络那样只是被动地传输字节,而且具有提供使用者输入定制程序到网络中的一种能力。
Because students in military school are at all times in an active or passive acceptance of a campus culture as the infection and nurtured, campus culture has become an important carrier of implicit education in military academies. 由于生活在军校中的每个人时时刻刻都在主动或被动接受着校园文化的感染和熏陶,校园文化也就成为军校隐性教育的重要载体。
The subject of passive writing is not such freedom, and the writing object and carrier have been strictly requested, while writing receptor also refers to some particular person. 被动写作的主体就没有这样的自由,写作的对象是规定的,写作载体也是有严格要求的,写作受体也是特指的人员。