know-all

We don't know all the circumstances, so it would be pointless to speculate.

我们了解所有情况, 妄加推测是没有意义。

CASEY SERIN knows all about the excesses of America's housing bubble.

CASEY SERIN非常了解美国房地产市场过多泡沫成分。

They knew all along that he was packing a gun.

他们向来都道他身枪。

We’re on nodding terms with our neighbours but we don’t know anyone else at all.

我们与邻居是点头之交，过其他人就认得了。

I know all these locks seem unnecessary but I believe it’s always better to play safe.

我道这么多锁似乎没有必要，过我相信谨慎点总没坏处。

I don’t really want to know all the whys and the wherefores. Just tell me what happened.

我无意了解前因后果。你只要告诉我发生了什么事。