1、constant

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。

恒定的;不变的

The average speed of the winds remained constant.

平均风速保持稳定。

2、burst out

突然…起来

The class burst out laughing.

全班突然大笑起来。

Then the applause burst out.

然后突然掌声雷动。

突然说出；大声喊出

'I want to be just like you', she bursts out.

“我想就像你一样。”她大声喊道。

突然出现；突然发生

Malaria is bursting out again all over the world.

疟疾突然又在全世界流行起来。

Then war burst out.

战争突然爆发。