Hard to predict but the center of mass behaves decently.

很难预测，但质量中心稳定运动。

youdao

Let's do an example. Let's try to figure out if we have just a uniform disk how hard it is to spin it around its center.

还是看个例子吧，有一张均匀的唱盘，让它绕中心旋转有多难呢？

youdao

First of all, we were concerned with the physical space in the data center and looked hard at server consolidation in the deployment of any applications.

首先，我们很关心数据中心的物理空间，竭力在一切应用程序的部署中寻求整合服务器的机会。

youdao

While many are working hard to build the tents and stages for the event, few want to speak about the man at the center of the occasion.

VOA: standard.2009.08.29

But in this moment, as in so many others like it, when I took stock of their unhappy reaction to what I said, I felt myself at the cold, hard center of a perfect storm: We expect more from technology and less from each other.

CNN: We expect more from technology and less from each other

Mr. Obama ran hard to the center on economic issues to win the general election.

WSJ: Flip-Flops and Governance

"Mr. Blackwell's worked very hard to become the center of attention in Ohio, " The Plain Dealer quoted Coleman as saying.

CNN: Ohio's Blackwell used to?spotlight