v. extend on all sides of simultaneously; encircle
vt. 包围, 环绕, 围绕
n. 围绕物
1. The garden is surrounded by tall trees.
花园被高大的树木环绕着。
2. We need to surround ourselves with positive people.
我们需要让自己身边有积极的人。
3. The police surrounded the building to catch the suspect.
警方包围了大楼以抓捕嫌疑犯。