English logical connectors, as we sometimes call signal words, name relationships between ideas in a sentence or a group of sentences.

英语逻辑连接词是连接句内或句子间语义关系的逻辑纽带。

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She attempts to call for help but her cell phone is unable to get a signal.

她想打电话寻求帮助，但是她的手机在这里接收不到信号。

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Some people deem it is a dangerous signal and call for public awareness of the negative effects it has brought about.

有些人认为这是一种危险的信号，因此需关注其给社会带来的负面影响。

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which mean "help me." Frederick Stanley Mockford created the mayday call signal in the nineteen twenties.

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The signal comes in the form of molecules which we're going to call throughout the lecture here 'ligands'.

信号通常以分子的形式来传递,在这门课里我们把这种分子叫做配体

耶鲁公开课 - 生物医学工程探索课程节选

Many analysts call it a sell signal when that histogram turns negative, which just happened recently.

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For companies known for a good in-store experience like IKEA, such results could signal a call to action.

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Meanwhile, Gordon was given a brand new bat-signal to call Batman.

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