英语翻译a fly is resting on the borrom of a closed jar.The jar i

A fly is resting on the bottom of a closed jar.The jar is placed on a very accurate balance,and there is equilibrium.The fly starts flying.Will there be equilibrium again.
一个苍蝇静止在密闭瓶子的底部,这个瓶子在一个非常精准的天平上,现在处于平衡状态.
苍蝇现在开始飞行,还会平衡吗?
ps：应该是bottom不是borrom吧