Quatrimycin
差向四環素, 四-霉素
??? 情景例句
But I have promises to keep,
但是我有約要赴
I would rather go today than tomorrow.
我寧愿今天去，而不愿明天去。
Visitors have been asked to keep the woods clean and tidy.
游客已被告知要保持樹林的整潔。