Finally, once a police car has the Tahoe in view and the road ahead is clear, a second signal slows the engine down.
最后，只要它进入警车的视线内，并且前方道路通畅，第二个信号就会让它的引擎慢下来。
For months after his discovery Dr Bhathal scanned the skies for a second signal to see whether it was just a glitch in his instrumentation but his search came to nothing.
在接下来的几个月内，为了确保这不是因为仪器故障导致的假讯号，巴瑟尔博士又一次扫描了这片区域，但却一无所获。
The first and second signal values are used to indicate moisture present in the skin of the user at the second skin measurement location.
其中所述第一和第二信号值用于指示在所述第二皮肤测量位置处存在于使用者的皮肤中的水分。
The system operates in a fail-safe mode since the microprocessor is controlling the EXPOSE signal and in addition pulsing a second signal at a 400Hz rate.
此时系统工作在安全模式，因为微处理器控制着曝光信号的产生并且还发出一个400Hz的脉冲信号。
CD80 is one of the co-stimulatory molecules binding CD28, which binds CD28 on the surface of t cells to provide second signal for efficient activation of t cells.
而CD 80是能够与CD 28分子结合的共刺激分子之一，它与T细胞表面CD 28分子的结合为T细胞有效活化提供第二信号。
The first signal is the binding of antigen with TCR on T cells. The second signal is the binding of co-stimulate on the APC with their receptors presenting on T and B lymphocytes.
第一信号为抗原与T细胞受体TCR的结合，第二信号为抗原递呈细胞上的协同刺激分子与T、B淋巴细胞上的受体结合。
The first signal is the binding of antigen with TCR on T cells. The second signal is the binding of co-stimulate on the APC with their receptors presenting on T and B lymphocytes.
第一信号为抗原与T细胞受体TCR的结合，第二信号为抗原递呈细胞上的协同刺激分子与T、B淋巴细胞上的受体结合。
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