在成功打开信号量之后，这个函数就会返回这个信号量的句柄，这样就可以在后续的调用中使用它了。

Upon a successful opening, this function returns the handle to the semaphore so that it can be used in the subsequent calls.

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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。

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.

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这一规划只需每次打开电脑或手机时使用一个简单信号- - -使用一种诸如数码标示、一张智能卡或指纹扫描器这类的装置。

The plan calls for a single sign-in each time a computer or phone is turned on, using a device such as a digital token, a smartcard, or a fingerprint reader.

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If the temperature drops below a certain level it sends a signal, 'turn on the heat', and that signal stays on until it gets a negative signal to turn off.

如果温度降到一定程度以下时,探测器会发送一个信号,打开加热器,直到加热器再收到关闭的信号,它就会一直开着

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