Please give us prior notice if you need an evening meal.

需用晚餐者，请预先通知我们。

《牛津词典》

If you need an extension, please tell me ahead of time.

如果你需要一次延期，请提前告诉我。

youdao

Note: If you need an introduction to mock objects, see Resources.

注：如果需要对mock对象的介绍，请参阅参考资料。

youdao

"If you are an actress, you really don't need to go to a plastic surgeon and give a picture of a famous actor and say,'I want to look like this.'

VOA: standard.2010.07.22

Now, why do you need a cell mediated immune response if you have an antibody response?

为什么你还要有细胞免疫反应呢,你已经有抗体应答了啊

耶鲁公开课 - 生物医学工程探索课程节选

It says that, "If a body has an acceleration, then you need a force and the relation of the force to acceleration is this thing."

它是这么说的,"如果一个物体有加速度,那么你需要有一个力,力和加速度的关系是这样的"

耶鲁公开课 - 基础物理课程节选

If you need an out-of-season apple from New Zealand, it comes on a ship.

BBC: Blue sky

If you need an alternative to the Von Trapps, let us suggest Evil Dead II on Showtime.

ENGADGET: HDTV Listings for December 23, 2006 HD

And if you need an excuse to pull this article out in the fall, Sept. 16 is Mexican Independence Day.

WSJ: Mastering the Margarita