Hematoxylon
洋苏木
🗣️ 情景例句
do I really have to
我是不是真的有必要
Karl must concentrate on his work.
卡尔必须集中精力于自己的工作。
Punctuality is a necessary habit in all public affairs in civilized society.
准时是文明社会中进行一切社交活动时必须养成的习惯。