■petrol n. 汽油

词形联想：patrol v. 巡逻

Eg: Doctors and nurses remained above ground while police patrolled the streets in case anyone tried to leave the shelters too soon. (NCE3 lesson 7 老版)新概念作文

■stretch n. 一大片（平地或水），连续的一段时间

at a stretch 连续的，一口气的，不停顿的

a stretch of land 一大片平地

a stretch of water 一大片水域

a stretch of hill 连绵不断的群山

Eg: He worked for hours at a stretch.

We drove fast on a stretch of open field.

He is unable to work for long stretches.

  v. 张开，伸展，延伸，连绵，扩展

He stretched out his hand to get the apple.

There are forests stretching for hundreds of miles.

Transport was rather stretched in the Spring Festival. 春节期间交通已经到了极限。