无酬劳;毫无结果;白白地;不花钱;免费
牛津电影里 75%
无酬劳;毫无结果;白白地
with no reward or result
牛津电影里 5%
不花钱;免费
without payment
释义来自《牛津高阶英汉双解词典》第 9 版