cost过去式
cost 的现在分词：costing；过去式：cost；过去分词：cost
cost
n. 费用；花费；价钱；成本；（为做某事涉及的）努力，代价，损失
v. 需付费；价钱为；使丧失；使损失；使付出努力；使做不愉快的事
例句：
How much does it cost to become a member?
要成为会员得花多少钱？
It's time we got on to the question of costs.
我们该讨论成本问题了。
That one mistake has cost him dear over the years.
那一个差错使他多年来付出了沉重的代价。
Cost was a key element in our decision.
价钱是我们决策时考虑的主要因素。
