n.传播者；发射机；发射台；送话器
That transmitter was beamed at Russia. 那台发射机曾用于对俄罗斯广播。
Your mobile device is a radio transmitter and receiver. 您的移动设备是无线电发射机和接收机。
The microphone, you see, acts much like a telephone transmitter. 你看，传声器作用与电话的送话器很相像。
n.神经传递素
n.免疫传递素
发射机
神经递质
