Where is the center of mass of this system?

这系统的重心何在？

youdao

And the center of mass of this eraser is somewhere in the middle.

这个橡皮重心在中间的某一点。

youdao

So here is the center of mass of that ladder, right in the middle.

这里是梯子的重心，在正中央。

youdao

Thomas Wang at the Mass General Heart Center was the senior author of the study.

VOA: special.2009.07.15

The new textbook book was put together by the Documentation Center of Cambodia, a non-profit group tasked with recording the years of mass killing under the Khmer Rouge.

VOA: standard.2010.04.19

Firebombing Jewish-owned vehicles is small potatoes in comparison to developments at the center of mass of the Israeli Arab onslaught: state land.

CENTERFORSECURITYPOLICY: Israel's unwavering Guardsmen

Petersburg, this location has widely been criticized by team officials, members of the media, and fans alike as inconveniently off-center from the critical population mass of the region.

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The bad force is an undulating, pullulating, filthy, dark mass, at the center of which a hell-mouth with dagger teeth and lips spews scalding yellow mist.

NEWYORKER: Green Lantern