打开信号机
signal───adj.显著的；作为信号的；n.(Signal)人名；(瑞典)西格纳尔；vt.标志；用信号通知；表示；n.信号；暗号；导火线；vi.发信号
signal wire───[通信]信号线
radio signal───无线电讯号；无线电信号
home signal───进站信号（机）；[铁路]进站信号；[铁路]进站信号机
signal processing───[通信]信号处理
alarm signal───[安全]警报信号；n.警报，警报信号
digital signal───[自][通信]数字信号
signal words───信号词；标志词
signal twice───发出两次信号
Infrared radiation heats up the pit membrane tissue, and TRPA1 channels open when a threshold temperature is reached, allowing ions to flow into the nerve cells and triggering an electrical signal.───红外线使窝器膜组织升温，当达到阈值后TRPA 1通路打开，离子流入神经细胞并催发电信号。
attendants set up a barrier to the cockpit and give us an all-clear signal to open the door, as we don't have a separate bathroom and have to use the same one as everyone else.───乘务员就会在驾驶舱前拉开一道屏障，然后给我们发送一个无人信号才能使用。
In some cases the specific change triggers a signal - the folded or square position may activate some other enzyme, or open a channel in a cell.───在某些情况下特别的变化能触发一个信号——折叠的或方形的状态将激活一些其他的酶，或在细胞中打开一个通道。
Granick thinks you're probably safe even if you purposely direct your laptop to an open signal.───格兰尼克认为，即使是故意用笔记本电脑使用公开的网络信号，你也可能是安全的。