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ball pen [英] [bɔ:l pen] [美] [bɔl pɛn] [短语] 圆珠笔 词频排名 46514/55435 学习人数 272 难度等级 1/10 认知比例 62.38% 例句 There is only one ball pen in the pencil box. 这铅笔盒里只有一支圆珠笔。 I bought this ball pen for two dollars. 我花二美元买了这支原子笔。 助记 联想 ball-pen 圆珠笔,ball-point 圆珠笔,ball-point pen 圆珠笔
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