1、come on

(表示鼓励)来吧

Come on Doreen, let's dance.

来吧，多琳，我们跳舞吧。

得了吧;算了吧

'Have you said all this to the police?' — 'Aw, come on!'

“你是不是把这些都告诉警方了？”“呀，怎么会呢！”

Come on, Sue, that was two years ago.

得了吧，休，那是两年前。

进展;进步

Lee is coming on very well now and it's a matter of deciding how to fit him into the team.

李现在进步很大，问题是如何在队里给他找一个合适的位置。

The knee's coming on fine, I'm walking comfortably already.

膝盖恢复得很好，我现在走路已经不疼了。

(新的季节或天气)到来

Winter was coming on again.

冬天又来了。

I had two miles to go and it was just coming on to rain.

我还要走两英里，这时候却下起了雨。

2、obsess

（使）着迷；（使）迷恋；（使）心神不宁

I must admit that maps obsess me.

我得承认我对地图十分着迷。

A string of scandals is obsessing America.

美国正被一系列丑闻所困扰。

3、constant

持续不断的;重复的;一直存在的

She suggests that women are under constant pressure to be abnormally thin.

她暗示说女性总是处在保持身材异常瘦削的压力之下。

Inflation is a constant threat.

通货膨胀始终是个威胁。

恒定物;常数；常量；常项

In the world of fashion it sometimes seems that the only constant is ceaseless change.

在时装界，有时似乎唯一永恒不变的东西就是不断的变化。

Two significant constants have been found in a number of research studies.

若干研究已经发现了两个重要常量。