Esters
[医]酯类
🗣️ 情景例句
What power options are available? ( steering, brakes, windows.... )
（这种汽车）有中控系统吗？
I often go to the office in the morning.
我常常在早上去办公室。
As usual, the police will have a difficult time.
同往常一样，警察的日子将不好过，