①有be harmful to(对……有害) 这样的短语吗?②成功克隆怎样说?(succeed cloning行吗?)③怎样区分the number of和a number of?

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①有be harmful to(对……有害) 这样的短语吗?②成功克隆怎样说?(succeed cloning行吗?)③怎样区分the number of和a number of?

①有be harmful to(对……有害) 这样的短语吗?②成功克隆怎样说?(succeed cloning行吗?)③怎样区分the number of和a number of?
①有be harmful to(对……有害) 这样的短语吗?
②成功克隆怎样说?(succeed cloning行吗?)
③怎样区分the number of和a number of?

①有be harmful to(对……有害) 这样的短语吗?②成功克隆怎样说?(succeed cloning行吗?)③怎样区分the number of和a number of?
1.有
2.对
3.the number of 是指数量 a number of 是许多
The number of the students in our school is about 1,000.
A number of students will go to college.