I've locked the door. Ther're as safe as houses.
我把门锁上了，很安全的。
(as safe as houses means very safe)
（as safe as houses指十分安全）
I've been in seventh heaven ever since I got engaged!
订婚后我一直很幸福。
(then in seventh heaven means extremely happy)
（then in seventh heaven指很幸福的）
If you have problems, call me 24/7;it doesn't matter if I'm sleeping.
如果你有问题，随时打电话给我；就算我睡着了也没关系。
(24/7 means at any time)
（24/7 指随时）
If you keep asking him about his ex-girlfriend, you'll be on thin ice.
如果你继续问他关于他前女友的事，你就危险了。
(be on thin ice means in a risky situation)
（be on thin ice指处境危险）
If you think I'm going to climb that rickety ladder, you're all wet.
如果你认为我会爬那架摇摇晃晃的梯子，那你就大错特错了。
(all wet means completely mistaken)
（all wet指大错特错）