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長い間, 長いあいだ, ながい間, ながいあいだ
1. long time, long interval, for quite some time
很长一段时间,一段很长的时间(期间),相当长的一段时间
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磨く, 研く, 琢く, みがく
1. to polish, to shine, to burnish, to scour, to scrub, to brush (teeth), to grind (e.g. a lens)
2. to refine (a skill, etc.), to improve, to hone, to polish (up), to cultivate (one's character)
抛光,擦亮,打磨,刷洗,刷牙,研磨(如透镜);用洗面奶洗脸(轻轻地磨);精进(某项技能等)、提升、磨砺、打磨、培养(品格)