Ferroxyl indicator
[化] 铁锈指示剂
🧩 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 a lovely area,
那里是个可爱的地方，
How long have you been married?
你们结婚多久了？
The train arrived on time.
火车准时到达。