This is nearly three times as many as in 1960, and half as many again as in 1990.

这个数字几乎是1960年的3倍，是1990年的一倍半。

youdao

This is nearly three times as many as in 1960, and half as many again as in 1990.

这个数字几乎是1960年的3倍，是1990年的一倍半。

youdao