quite a while相当一段时间
eg You've been away quite a while.
你已经离开很长时间了。

soul searching 灵魂搜索，这里可理解为“反思，深思熟虑”
eg College is no longer a romantic place where you do some soul searching.
大学不再是一个浪漫的地方去让你反省灵魂。

it would better最好…
eg I think that will be too much for two persons. It would better to reduce the number by two dishes.
我认为那对两个来说太多了，减少两道菜比较好。

go ahead说吧，开始吧，开始做（某事）
eg But insiders still reckon the two mega-mergers will go ahead.
但是内部人士仍然相信这两起并购案会继续下去。

as long as只要
eg Music has been with us as long as we can collectively remember.
只要音乐与我们同在，我们就会有共同的记忆。