12.某些数字的读法与写法, 如: $10.20读作ten dollars and twenty cents; 35O 读作thirty-five degree; -20O 读作twenty degree below zero或minus twenty degree; Napoleon III读作Napoleon the third; World War II读作World War two或the second world war.
13.年龄的表示方法:
a. The boy is ten years old.
b. The boy is at the age of ten.
c. He is a ten-year-old boy.
d. The boy is of ten years.
14. in ones + 整十数的复数形式, 表示在某人几十多岁的时候, 如:
a. He became famous in his thirties.
15. in the 1930s / 1930s表示在二十世纪三十年代
16. 序数词前一般要用the, 但表示又一,再一的概念时, 序数词前也可以用a / an
a. They plan to buy a second house. 他们计划再买第二房子
四.选择使用数字或文字表示数的场合:
1.一般来说, 两位数以内的数目用文字表示, 超过两位数的数目用数字, 如:
a. There are forty-five students in our class.
b. There are about 2,100 students in our school.
2.在句首的数目多用文字表示:
a. One hundred and two voters are against the project.
3.基数词的复数形式多用文字表示:
a. There are three twos in six. 6之内有三个2.
b. He became famous in his fifties.
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