1、obstacle

障礙物

Most competition cars will only roll over if they hit an obstacle.

大多數賽車只有在撞上障礙物時才會翻車。

He left her to navigate her own way round the trolleys and other obstacles.

他扔下她一個人在一堆手推車和其他障礙物之間繞來繞去。

障礙；困難；阻礙

Overcrowding remains a large obstacle to improving conditions.

過分擁擠仍然是改善環境的一大障礙。

To succeed, you must learn to overcome obstacles.

必須學會克服困難才能成功。

2、instant

瞬息;頃刻;剎那

For an instant, Catherine was tempted to flee.

有那么一會兒,凱瑟琳很想逃跑。

The pain disappeared in an instant.

疼痛立刻就消失了。

(某一)時刻

At that instant the museum was plunged into total darkness.

就在那時,博物館陷入了一片漆黑。

In the same instant he flung open the car door.

與此同時,他猛地推開了車門。