我见过蜜凯拉一次，时间很短。
We'll only do it once— if at all.
我们就是干也只会干一次。
The water is fine once you're in!
你一旦下了水，就会觉得水里挺舒适。
For once, Dad is not complaining.
就这一次，爸爸没有抱怨。
Just for once he arrived on time.
只有这一次他按时到了。
我只去过那里一次。
She once ruled over a vast empire.
她曾统治过一个幅员辽阔的帝国。
I once went out with a French man.
我曾与一个法国人恋爱过。
他曾在赞比亚生活过。
这种事儿他仅仅干过一次。
我曾经见过你母亲。
It's easy, once you've got the knack.
你一旦掌握这个技能就容易了。
Once destroyed, brain cells do not regenerate.
脑细胞一旦遭到破坏，就不能再生。
He cleans his car once a week.
他每周洗一次汽车。
我无故又打了他一下。
Everyone began talking at once.
大家同时开始讲话。
He never once offered to help.
他从没有主动提出过帮忙。
Once again the train was late.
火车又一次晚点了。
Let me hear it just once more.
让我再听一遍。
I can't do two things at once.
我不能同时做两件事。
她父母从前开过一家商店。
An old oak tree once stood here.
以前这儿长着一棵老橡树。
The place at once enraptured me.
这个地方立刻把我迷住了。
The lion roared once and sprang.
狮子吼了一声，跳了起来。
If necessary I can come at once.
如果有必要，我可以马上来。
All at once she lost her temper.
她突然大发脾气。
'Come here at once!' she ordered.
“马上过来！”她命令道。
The lion roared once, and sprang.
狮子吼了一声，跳了起来。
I can't be in two places at once.
我不能同时身处两地。
I can't be in two places at once.
我不能同时身处两地。
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