once 四级

there once was a man.

经有个人。

once a day.

天

once two is two.

二乘以得二。

a once powerful nation

很强盛的国家

Once one is one.

得。

Once is enough for me.

对我来说就够了。

the once capital of the nation.

该国以前的首都

For once he was early.

只有这早到了。

repeat once more .

重复。

they deliver once a week.

们星期送货。

every once in a while

偶尔, 间或

All at once it began to rain.

突然间下起雨来。

Once again the train was late.

火车又晚点了。

The Nagual was once again blamed.

纳瓦被谴责。

She once knew him.

她以前认识。

to snarl a once simple problem

使本来很简单的问题发生麻烦

He was once a professional grass.

个职业告密者。

The institution of slavery was once widespread.

奴隶制度度广为流行。

I was absent once or twice.

我缺席两。

He was once a potent ruler.

经有权势的统治者。