Isovalerate
异戊酸
🗣️ 情景例句
Could you tell me a little about your background?
能否请您简短地谈一下贵公司的背景？
Civility costs nothing.
礼貌不须什么代价。
At the international level, sport is frankly mimic warfare.
在国际比赛中，体育简直是一场模拟战争。