signal是正极吗

问题描述

精选答案

signal不是正极，是信号

例句

1.

You must signal which way you are going to turn.

你要朝哪个方向转，必须发出信号。

2.

A sensor channels the light signal along an optical fibre.

传感器沿光导纤维输送光信号。

3.

When I give the signal, run!

我一发信号，你就跑！