trade-off

也可写作tradeoff，不可数名词，译为“权衡”“折中”或根据语境译为“鱼和熊掌不可兼得”，来自短语“trade off”,可在写作口语中代替balance。

Life is full of trade-off. You cannot have your cake and eat it too.

trade-off between a and b

There must be a trade-off between quality and quantity for many manufactures.

But leaving the EU inevitably involve difficult  trade-offs.

This decision is the result of the trade-off between efficiency and cost.

Study abroad is the result of the trade-off between my interests and future development.