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
It's an excellent title.
这是个绝妙的书名。
How are you this evening?
今晚上您好吗？
It seemed as if there was no way out.
看情形似乎没有出路了。