他们决不能长时间在狭隘空间保持不动的坐姿。

They should never be kept too long a time in a sitting, confined, or inactive posture.

youdao

观看此视频，以便更好地了解广告竞拍和如何使你的广告空间保持最高的竞争性。

Watch this video to better understand the ad auction and how to enable the most competition for your ad space.

youdao

26分钟的进球，完美诠释了王牌中场哈维的与众不同，以及巴萨团队跑动和空间保持的灵活掌握。

It came on 26 minutes and it was the perfect demonstration of what makes the midfielder Xavi different, and of Barcelona's mastery of movement and space.

youdao

But it's not a big con, because you can set up experiments in free space far from everything, where objects will, in fact, maintain their velocity forever.

但这并不是个反例,因为你可以在一个远离一切的空间里做实验,在那里,物体可以永远保持现有速度

耶鲁公开课 - 基础物理课程节选

We said, "Let's take, for the simplest case that we can possibly imagine, namely a particle moving in one dimension along the x-axis with a constant acceleration a.

我们说过,"考虑我们可以想象的最简单的情况,即质点在一维空间运动,沿着 x 轴且保持恒定加速度 a

耶鲁公开课 - 基础物理课程节选