He gave us his solemn word, then he welshed on us.他向我们郑重承诺然后又对我们食言了。She welshed on ( the bargain she made with ) us.她与我们洽谈成交后又翻悔了.He often welshed on his promises.他过去经常逃避义务,不履行诺言....
Older cars inevitably lack the latest safety refinements.老款的汽车难免缺少经过改进的最新安全保护装置。The new model has electric windows and other refinements.新型号有电动窗和其他改良装置.The oven has an automatic timer and other refinements.这个烤箱有自动定时器及其他改...