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。
I once went out with a French man.
我曾与一个法国人恋爱过。
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。
Venice was once a city of rich merchants.
威尼斯曾是富商云集的城市。
She once made a brief appearance on television.
她曾在电视上短暂露面。
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。
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。
She fell in with my idea at once.
她立刻同意了我的主意。
I can't be in two places at once.
我不能同时身处两地。
我每周做一次有氧健身运动。
Once on the open road, he let rip.
一上空旷的公路，他就全速行驶。
She gave the apartment a once-over.
她匆匆扫视了一下那间公寓。
She gave the apartment a once-over.
她匆匆扫视了一下那间公寓。
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