The number of reported crimes is increasing at an alarming rate.
报警案件的数量正在以惊人的速度增长。
A cold spring will provide a natural check on the number of insects.
寒冷的春季会自然控制昆虫的数量。
The number of new students decreased from 210 to 160 this year.
今年新生人数从210减少到160。
