Phenanthrol
[化] 菲酚
🗣️ 情景例句
Please try to keep relaxed, sir.
别太紧张，先生。
I hope I'm not in the way.
我希望没有造成妨碍。
I want to improve, but I don't know how.
我想提高它，但又不知道怎么样才能提高。