问两个词组，什么意思

1.leak like a sieve （本意：向漏网一样泄漏）嘴松, 容易泄漏秘密

2.mull over 再三思索；反复考虑

1） reflect deeply on a subject; "I mulled over the events of the afternoon"; "philosophers have speculated on the question of God for thousands of years"; "The scientist must stop to observe and start to excogitate"

2）(synonym) chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, ruminate, speculate

3）(hypernym) think, cogitate, cerebrate

4）(hyponym) premeditate

3.halfway house折中办法，妥协办法；中途点；（即将刑满释放者的）过度教习所；两城镇间的歇脚客栈

leaks like a sieve: phrase commonly used to say that something is leaking profusely when it is not supposed to leak at all. A sieve is a wire mesh or perforated metal utensil used for straining or sifting. Therefore anything that is leaking like a sieve is not holding water at all.
eg:I have tons of water damage from the rain. My roof leaks like a sieve.
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