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

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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There was a growing Center and the critical mass of voters of all parties and stripes told my interviewers that their preference for a President was a problem-solver, consensus-builder, and competent manager.

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Located next to the convention center, the stadium would have doubled the mass and length of the huge bunker against the river already established by that "lump of black coal" -- as essayist Phillip Lopate described its dark bulk in his literary trip around the edges of Manhattan -- cutting off views and access with nearly a mile of hulking wall.

WSJ: New York Stadium Deals: Good and Bad