What we have once enjoyed we can never lose.
我们永远也不会失去曾欣赏喜欢过的事儿。
We're all pleased that we have once again won.
真高兴我们又一次获得了胜利。
We're all pleased that we have once again overcome the difficulty.
真是高兴我们再次战胜了困难。
You must become our permanent customers as long as we have once cooperation.
我们只要有一次合作，您一定成为我永久的客户。
We have to resolve this matter once and for all.
我们必须彻底解决这件事情。
We don't have the capacity to do everything at once.
我们没有能力同时做所有的事情。
"Do you know there is one thing we have never once thought of?" he said.
“你知道有一件我们从未考虑过的事吗？”他说。
We have to water this cactus once a month.
我们必须每月给仙人掌浇一次水。
You see, we really ought to have a Banquet at once, to celebrate this affair.
你看，我们真应该马上举行一次宴会来庆祝这件事。
And I think once we ask that question we have to go back, actually, to life.
我认为，一旦我们问这个问题我们必须实际上回到生命。
Once we have one object, there are two ways to create any child data objects.
有了一个对象之后，即可通过两种方法来创建子数据对象。
According to the information that we have at this time, the incident only occurred once.
就我们目前掌握的情况，这次事件还是一次偶发事件。
Once this record is hardened on a log we know and have recorded that.
一旦该记录在我们知道的日志中被强调并且已经记录。
Once we have the instance of Employee we simply modify its data with traditional setters.
有了Employee 的实例后，便只需通过传统的 setter 方法来修改其中的数据。
Once we have those facts, we must act upon them, "he said."
一旦我们得到了有关事实，我们就必须采取行动。
So, you must delivery at once, otherwise, we have to cancel the order but order in other place.
因此，贵方必须立即发货，否则我们将被迫取消订单，到另处订货。
Once again, we have the same mix of homespun and high tech.
又一次地，我们见到了质朴和高科技的组合。
Time is a valuable resource that we do not have to spend all at once.
时间是一种宝贵的资源，我们不必要一次性耗尽。
Once we have the full facts we will take decisive action.
一旦掌握了这件事的全部真相，我们将采取果断的行动。
Now, once we have made a choice then we can define the flux integral.
一旦我们做出了选择，同时也就可以定义通量积分。
Once we have been able to keep students quiet, then the real work begins.
一旦我们能够然学生保持安静下来，接下来才开始真正教学。
Gong said: "Once we have sold all this stock we'll leave."
销售商龚容川说：“等我们把存货全都出售我们就走了。”
Einstein once wrote that "the most beautiful experience we can have is the mysterious."
爱因斯坦曾写道：“我们拥有的最动人心弦的经历莫过于探索神秘世界。”
If we save a little every day, then once a week we can have a brief shower.
如果每天能攒下一点，那我们每周可以稍稍冲一下澡。
We see them once a year and of course we miss them, but we have no choice; we have to work here to earn money.
我们一年只能见他们一次，肯定非常想，但是没办法。 我们要在这里工作、赚钱。
In addition to the quiz, we have tests once every month.
除了小测验以外，我们每个月还有一次测试。
我们必须马上出发。
我们必须马上出发。
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