书籍 English File – 基础 - 第 9C 课

used when we want to talk about a person or thing for the first time or when other people may not know who or what they are

英语不定冠词

the number 100

一百号

used to connect two words, phrases, or sentences referring to related things

和

the number 5

五号

referring to the numerical value that represents the result of multiplying two by one hundred

二百

referring to the numerical value that represents the quantity or value obtained by multiplying three by one hundred

三百

the number 50

五十号

the number 75; the number of legs on seven crabs plus five

七十五

the number 1 followed by 3 zeros

一千号

the number 1 followed by 6 zeros

一百万