重点讲解：
trip up
绊倒；挑剔
The lawyer tripped the witness up.
律师让证人自相矛盾。
The difficult question tripped up most of the students.
这道难题让大多数学生犯错误。
Nip
vt. 夹；捏；剪断；冻伤；阻止
vi. 夹；捏；刺骨；小饮
n. 夹；捏；刺骨；小饮
There is a nip in the air.
空气寒冷刺骨。
If we attack quickly, we can nip the enemy's plans in the bud.
如果我们迅速进攻，我们可以把敌人的计划消灭在萌芽状态
bud
n. 芽，萌芽；蓓蕾
vi. 发芽，萌芽
vt. 使发芽
Rosanna's favourite time is early summer, just before the buds open.
罗莎娜最喜欢的时节是初夏，就在花蕾开放之前。
he stooped and kissed the beautiful bud.
她弯腰在美丽的花蕾上亲了一下。
keep secret
保密；保守秘密
Read on to find out some of the best kept secrets to keeping a relationship strong.
你可以来读一读这篇文章，找出能够让你保持良好关系的秘方。
Despite the best efforts of the BBC it had become one of the worst-kept secrets in television.
尽管英国广播公司使尽浑身解数，但在电视媒体面前保密工作可真没做到家。

考考你：

翻译

1.小孩失足跌倒。

2.意识到嫉妒并在它发展到无法控制之前就把它消灭于萌芽状态，这一点至关重要。

3.我认为这确实是保守得最好的秘密之一。

上期答案
1.Have you ever chewed bubble gum?
2.He spurned the advice of management consultants.
3.He'd been drunk when I arrived. Now he was sober.