1.as it happens 碰巧;偶然发生
As it happens, they are here.
恰好他们在这儿 。
2.piggyback 以现有想法为依托
I was just piggybacking on Stokes's idea
我只是借用了斯托克斯的想法 。
3.yield 产生
Higher-rate deposit accounts yield good returns.
高利率的存款会产生丰厚的收益 。
4.shed 流出;散发
They will shed a few tears at their daughter's wedding.
他们会在女儿的婚礼上落泪的 。