Optical indicator
[机] 光学指示器
🧩 词语组成解析
indicator
['ɪndɪketɚ]
n. 指示器;[化]指示剂;指示者;
🗣️ 情景例句
How long does it take you to get through a letter?
你写一封信要花多少时间？
Wade not in unknown water.
不知水的深浅，不可粗心趟水过河。
We need to cooperate perfectly to win the game.
要想赢得比赛，我们需要密切配合。