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

The ligands are bringing some message, they transmit the message by binding to the receptor.

配体带有一些信息,它们通过与受体结合来传递这些信息

耶鲁公开课 - 生物医学工程探索课程节选

All of them could potentially be receiving signals from a ligand or a chemical.

它们全都能接收,由配体或某种化学物质传递的信号

耶鲁公开课 - 生物医学工程探索课程节选

Now, how they carry signals is that these neurotransmitters act as ligands.

它们传递信号的原理如下,神经递质作为一种配体

耶鲁公开课 - 生物医学工程探索课程节选