提示：点击例句中的单词，就可以看到词义解释

The fortress is perched in close proximity toa pass .

这座城堡靠近一个出口。

You brought a cripple toa discotheque , to dance ?

你带一个瘸子来迪斯科舞厅,来跳舞?

I usually go toa movie on weekends .

我通常在周末看电影。

We were attached toa national guard unit .

我们和国民警卫队一起行动。

The scientists endeavor to elevate it toa new high by laser separation .

科学家努力用激光分离机把冶金工业提高到新的水平。