trenchant adj. 尖酸刻薄的 (caustic) / ˈtrɛn(t)ʃənt /
penchant n. 倾向 (a strong liking for something or a strong tendency to behave in a certain way) / ˈpen(t)SH(ə)nt /
command v. 控制 (to have authority and control over (a group of people, such as soldiers)) / kəˈmænd /
commend v. 赞美 (to praise (someone or something) in a serious and often public way) / kəˈmɛnd /
comment n. 评论 (a spoken or written statement that expresses an opinion about someone or something) / ˈkäment /
commence v. 开始 (to begin) / kəˈmens /
commerce n. 贸易,商业 (activities that relate to the buying and selling of goods and services) / ˈkämərs /