物体的重心是它平衡的关键。
wùtǐ de zhòngxīn shì tā pínghéng de guānjiàn 。
The center of gravity of an object is the key to its balance.
在设计这座建筑时，我特别注意了重心的位置。
zài shèjì zhè zuò jiànzhù shí ， wǒ tèbié zhùyì le zhòngxīn de wèizhì 。
When designing this building, I paid special attention to the position of the center of gravity.
运动时保持身体的重心平稳非常重要。
yùndòng shí bǎochí shēntǐ de zhòngxīn píngwěn fēicháng zhòngyào 。
It is very important to keep the body's center of gravity stable while exercising.