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- 常用in common usage
- 常often
- 蚊mosquito
- 常会regular session
- 不常seldom
- 常去resort
- 驱蚊剂culicifuge
- 常开normal open
- 防蚊mosquito-proof
- 灭蚊kill mosquito; mosquito eradication
- 常压normal atmosphere (An)
- 灭蚊灯Mosquito killer lamp
- 常微分方程ordinary differential equation
- 按蚊anopheles
- 常绿evergreen
- 驱蚊器mosquito repellant
- 常染色体autosome
- 常在be everlasting
- 常闭normal close
- 常用语common-use words