at times,at a time,at one time,at the time的区别和用法

at times:
有时；不时
[例句]
The tide is, at times, very high.
潮水有时涨得很高。
I like Bob but he's very annoying at times.
我喜欢鲍勃，但是他有时也很烦人。
The tide is at times very high.
潮水有时涨得很高。
She calls on me at times.
她有时来看我。
at a time
作“一次，每次”讲，常用于“数词+at a time”的结构中。例如：
Enter two at a time.
每次进来两人。
He checked them off one at a time as they came in.
他们进来时，他一个一个地核对。
注意它与at