Either so that they wouldn't have to carry everything with them or so they could save time once they arrived at a site by not having to make stuff from scratch.

这样他们要么就不用把所有东西都带在身边了，要么他们到了一个地方的时候不用从头开始做东西，可以节省时间。

youdao

Far from a kind of charity they once were, senior citizen discounts have become a formidable economic privilege to a group with millions of members who don't need them.

老年人折扣已不再像过去那样是一种慈善活动，而是一种令人敬畏的经济特权，属于这个有数百万不需要该折扣的成员的群体。

youdao

When small fish face an extremely difficult problem-an attack, say, from several predators at once-they deal with it by forming a school.

当小鱼面临极其困难的问题时，比如说，突然遭到几个捕食者的袭击，他们会立刻形成鱼群。

youdao

Yet now,she says, people once again are faced with extensive crop losses and the loss of cattle from drowning.

VOA: standard.2009.09.05

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

Once the site is developed, Paul Woods says the fuel it produces will be competitive with gasoline produced from petroleum at nearby refineries.

VOA: standard.2009.09.02

The Legion, which has facilities in Rhode Island, has been the target of a petition from women once associated with it and is being sued in Connecticut by a man who says he's Maciel's son.

WSJ: RI judge orders Legion of Christ papers unsealed

The Market Vectors Russia (RSX) ETF is down 0.3% as oil prices fall from the highs once associated with the Iran-Israel nuclear standoff.

FORBES: Popping The Bubble: China Home Values Falling

What makes -- what prevents the larger financial firms in the U.S. from once again becoming not competitive with international financial organizations?

WHITEHOUSE: Press Briefing