A signal is an action that distinguishes one type of person from a would-be mimic because it would be too costly for the mimic to carry out.

信号是区别一类人和一个有意模仿者的行为，因为这个行为代价过高，模仿者很难做到。

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Using anti-CD3 and anti-CD28 to mimic stimulatory signal I / II, to study their function of activing T cells in order to explore the possible mechanism of immune up and down regulation.

利用CD3/28双抗体模拟第一、二信号的变化探讨免疫上下调节的可能机制，为我们研究输血带来的免疫影响及如何纠正提供可依靠的线索。

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PlexTV enables the use of Plextor's PX-612U drive with these previously unsupported devices by translating signal output to mimic a hard drive.

ENGADGET: Plextor's new external DVD burner works with TVs, no computer required