句型as...as...can(may)beIt'sasplainasplaincanbe.句型It'sin(with)...asin(with)It'sinlifeasinajourney.请高手解释下句型以及例子,谢谢

Question

句型as...as...can(may)be
It's as plain as plain can be.
句型It's in (with)...as in(with)
It's in life as in a journey.
请高手解释下句型以及例子,谢谢

Answer 1

as...as...can(may)be,“...得不能再...了”.比如例句,意思就是普通得不能再普通了.
It's in (with)...as in(with),换句麻烦点的汉语,就是说“it之于...,如同it之于...”例句意思是“这之于生活就如同其之于旅行”