在气象学中，平衡高度（Equilibrium level, EL）为，当上升气块遇到与自身温度相当的环境空气时的所在高度。
一定要保证装载货物高度不高于出风口的平衡高度。
Must ensure that the load is not higher than the height of the air outlet.
就一个实现包来说，这个包是平衡的，即高度不稳定。
This package is balanced in the sense that it is an implementation package: highly unstable.
如果你高度平衡但却极其无聊，那么又有何意义？
If you're highly balanced and highly bored, what's the point?
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