数字分整数、分数、小数;算式分加、减、乘、除等。
1.表示整数、次数的词组:个(one),十(ten),百(hundred),千(thousand),万(ten thousand),十万(one hundred thousand),百万(million),千万(ten million),亿(one hundred million),十亿(英one thousand million;美billion),百亿(英ten thousand million;美ten billion);
一次(once),两次(twice),三次(three times),四次(four times);
第一次(for the first time),第二次(for the second time),第三次(for the third time);上次(last time),这次(this time),下次(next time)等等。
2.分数、小数:
one half(1/2),one quarter(1/4),five-eighths(5/8),two and two-fifths(2又5分之2),two point eight(2.8),zero point five(0.5),thirty-five point four two nine(35.429),
thirty-nine percent(39%),four per mille (4‰)、4 per cent. 4%等。
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