She always writes me once a month, if only to scold me because I haven't answered her last letter yet.

她总是一个月写一封信给我，即使仅仅是为了责备我还没有回她的上一封信。

《柯林斯英汉双解大词典》

So a neutron is challenged if you will because once it's born we're not exactly sure which way it's gonna go.

所以，一个中子是被挑战的，如果你愿意，因为一旦那产生了，我们不会很确定，它会采取哪种方式。

youdao

Now, if you run the form, you'll still see the alert box, but only once, because the new value is allowable according to the schema.

这时再运行表单，我们仍然会看到警示框，不过它只会出现一次，因为根据模式新值是允许输入的。

youdao

"Himmler once declared that the Nazis had to kill all the Jews because, if not - quote - their grandchildren will ask for their property back.

VOA: standard.2010.07.26

And,when I once took the train over to Poitiers,it took three hours, because if you go across the lines it's not good.

由此我坐火车去普瓦捷,会花三个小时,因为穿过省界的话是很不合适的

耶鲁公开课 - 1871年后的法国课程节选

And, so, people would come down and they'd have their pictures taken with a picture, as if it was part of the true cross of the crashed Vendome column; because for once they had won, for once they had won.

所以,人们会来这里,和那张画合影留念,仿佛这是,旺道姆广场的纪念柱的墓碑,因为他们曾经胜利过,他们曾经胜利过

耶鲁公开课 - 1871年后的法国课程节选

And that's important, because once you become a diabetic, even if you drop your numbers, you will always be classified as a diabetic, making it difficult to acquire good insurance.

CNN: Reversing diabetes is possible

In my mind now I'm starting to switch off a little bit and starting to think maybe the fight's not happening, which is a bad thing because once I start switching off mentally then if it does happen I'm not going to be fully on my game.

BBC: Carl Froch's bout with Mikkel Kessler to defy ash cloud

"My father always advocated gaining self-confidence outside the family business because once you're in, you never know if you're doing a good job or if people are just being nice to you, " he says.

FORBES: Saying "No Thanks" To Dad & Co.