Achilles was vulnerable only in his heel.

阿基里斯只有脚后跟会受伤害。

2.lawsuit n.诉讼；控诉

They threatened him with a lawsuit.

他们以诉讼来威胁他。

3.smartphone n.智能手机

Android is now the bestselling smartphone system, after passing sales of the iPhone late in 2010.

在2010年年末销量超越苹果iPhone后，安卓系统如今已经成为最畅销的智能手机操作系统。

4.turf n.草皮；泥炭

He was busy leveling the ground and laying turves.

他正忙于平整土地铺草皮。

5.surge n.汹涌；波涛

A surge of demonstrators broke through the fence.

汹涌而来的示威者冲破了围栏。