Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/a46be8ddb3c68eb04daff0d1bb95c3e2.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 centre of gravity英英字典_centre of gravity剑桥英语解释_centre of gravity柯林斯英文解释_94生活常识网有道词典
1. N-COUNT The centre of gravity of an object is a point in it. If this point is above the base of the object, it stays stable, rather than falling over. 重心