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
Sometimes he's very sad.
他有时很忧悒。
Progress is the activity of today and the assurance of tomorrow.
进展即今日的活动和明日的保证。
Mr.Stuart Page, will be retiring next week.
斯图亚特。佩奇先生下星期就退休了。