at后面加名词。
at：prep.在(某处);在(学习或工作地点);在(某时间或时刻)。 扩展资料
The resources at our disposal could have been better utilized.
我们所掌握的`资源本来可以利用得更好，获得更高的效益。
He's an expert at getting his own way.
他在如何达到自己的目的方面很在行。
The weather is very changeable at this time of year.
年年在这个时候天气都变化无常。
Almost all homes have at least one TV set.
差不多每家都至少有一台电视机。
I was still in short trousers at the time.
我那时还在穿着短裤呢
