谁能给我详细解释下blow apart,on one's trail,cut down,keep sth in mind这4个词组什么意思啊..详细说下.

blow apart分开
e.g.
That jerry-built cabin will blow apart in a strong wind.
那间草草建起的小屋一阵强风就会被吹走的。

on one's trail紧追\追捕\跟踪
e.g.
The police are hot on his trail.
警方在跟踪追捕他。

cut down降低\削减\减少....
e.g.
Cut down on your drinking.
要减少饮酒。

keep sth in mind把...记在心里\记住
e.g.
I'll keep that in mind.
我会记住的。

除了打击，对一个人的线索，削减，保持sth在记