1.a special treat 特别的消遣
a real treat 喜之不尽
my treat 我请客
例句：Be sure they understand this is a special treat and privilege.
你要让他们明确这是一种特殊的奖励。

2.a spoiled brat 娇惯坏的淘气鬼
例句：No parent wants a child who is a spoiled brat.
没有哪个父母想让自己的孩子变成一个被宠坏的坏孩子。
He's spoilt rotten (= a lot)
他给惯得一点样子都没有了。
be spoilt for choice (东西多得)挑花眼

3.Be ideal for sb 理想的
Ideal candidate 理想人选
Ideal opportunity 绝好机会
例句：And it's so lightweight I could barely even feel it in my pocket, which should be ideal for athletes.
放在我的口袋里几乎感觉不到重量。可以说，它会是运动员们理想的随身播放器。

4.at your mother's knee 小时候；孩提时
例句：On the other hand, you learn some leadership skills, like self-confidence, at your mother's knee and at school.
但另一方面，你会在幼年受教于父母时和求学时习得一些领导技巧，譬如自信。

5.cause havoc throughout the area 给整个地区带来了灾害
play havoc with 严重破坏
wreak havoc on 严重危害
例句：The floods caused havoc throughout the area.
洪水给整个地区带来了灾害。