摘要:5.分数的表达: 分子用基数词.分母用序数词.分子大于“1 .分母则加“s .如:1/3 one third.2/3two thirds, 另外:1/2 a(one)half; 1/4one fourth或a(one)quarter;3/4threefourths或three quarters. half a second; a quarter of a second四分之一秒

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