n.交易；交換
Another tradeoff society faces is between efficiency and equity. 另一個(gè)社會(huì)所面對(duì)的是效率和公正之間交易。
That is a tradeoff in the progress of pullulation.I pay what I owned for what I have now. 那是成長(zhǎng)中的交易，我花費(fèi)過去擁有的來支付現(xiàn)在所得。
