adj. gratuitous
那是因为母亲对儿女的操劳是无代价的。
That is because the mother of sons and daughters of toil there is no price.
这个代价太大了，只为了，第一次学期通过一门无记录的课程，你们知道着纪律委员会，谁最为严厉吗？
It's a huge price to pay in a pass-no-record first semester class. And, you know who is most severe on the committee on discipline?
无远见的政策使我们现在不可避免地要为气候变化付出代价。
Climate change is the price we will now inevitably pay for short-sighted policies.
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