since all the information is in the current price, you don't have to worry about whether it went up or down yesterday, to decide what it's going to do today.

因为当前价格代表了所有信息，你就不需要去考虑昨天股价,是涨了还是跌了，再去判断它今天的价格会怎么变化。

麻省理工公开课 - 计算机科学及编程导论课程节选

You don't have to understand every little thing all the time, you know.

你不需要一直都能理解所有的东西。

要想成为读书达人 - SpeakingMax英语口语达人

And it was fun for us but thankfully, we didn't have to implement all this stuff ourselves.

这对我们也许是有趣的，但幸运的是,我们不需要自己实现所有的功能。

哈佛公开课 - 计算机科学课程节选

You didn't have to go to some fancy school if you were a czar, to be a czar in training. You had tutors as all these folks did.

如果你是沙皇,你不需要读什么贵族学校,沙皇太子有私人导师,所有的太子都有

耶鲁公开课 - 欧洲文明课程节选

Not everybody had to be involved in creating food, and so that gave people more time to trade, to develop other products, to be involved in non-food pursuits and many, many more things.

不需要所有人都忙于制造食物,因此人们有空进行贸易,开发其它产品,以追求其他更多,而不单单是食品

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But of course, as we know and thinking about familiar objects, we don't need to have every single piece of an object, of an identity stay the same to have the same feeling.So-- I think previously I talked about the steering wheel on my car.

但很明显的,根据我们的常识，我们不需要要求,所有的物体，都保持不变,从而得到同一个肉体-,我记得我之前讨论过,我的汽车的方向盘。

耶鲁公开课 - 死亡课程节选

Every unit in the backbone of this ladder has the same sugar unit, the same pentose; it's either RNA or DNA and has ribose or deoxyribose, so you don't need to describe the whole thing.

主链的每个单位,都由相同的糖单位构成,同样的戊糖,RNA里是核糖,DNA里是脱氧核糖,所以你不需要所有细节都描述

耶鲁公开课 - 生物医学工程探索课程节选

So what I want to point out with this case in beryllium is that you don't have to use all of the electrons to figure out the bond order, and in fact, once you get to molecules 10 that are from atoms with atomic numbers of 8 or 10, you're not going to want to maybe draw out the full molecular orbital diagram.

我要指出的是,在Be这种情况下,你不需要利用,所有的电子来指导键序，实际上，一旦分子中,原子序数到达了8或者，你也许不想画出,整个分子轨道图。

麻省理工公开课 - 化学原理课程节选