Underbuild
v. 建筑在...的下面, 加強(qiáng)...的基礎(chǔ)
??? 情景例句
What is it?
是什么主意？
When did you travel?
你什么時(shí)候旅行？
but on the second, I applied myself assiduously to the task.
不過(guò)，新年第二天，我全力以赴地照著去做了。