Above him is 60 feet of sheer cliff...

他的头顶上是60英尺高的峭壁。

The sheer cliffs on three sides and the steep summit made the citadel virtually impregnable.

三面陡峭悬崖外加高耸的山顶让这座堡垒坚不可摧。

But they'll soon need to return to the safety of the sheer cliffs.

但很快他们又得回到峭壁上的安全区域。

The going became easier. Though there were still sheer cliffs on their left, the ground was becoming lower on their right.

道路也好走了一些。虽然左边还有峭壁悬崖，右边的平地却渐渐开阔起来。

Then it climbs swiftly through a narrow gorge beneath sheer towering cliffs hundreds of metres high, up on to the plateau above.

然后它迅速爬过数百米高的陡峭悬崖下方的狭窄峡谷，到达上方的高原。

Julia stared up at the sheer cliff. " What other choice do we have? " she said.

茱莉亚凝视着陡峭的悬崖。 “我们还有什么选择？”她说。

A " sheer cliff" would be a cliff that goes up and down almost in a straight line, completely perpendicular.

“陡峭的悬崖”是指几乎直线上升和下降的悬崖，完全垂直。

Inaccessible Island is an extinct volcano ringed by sheer cliffs in the middle of the South Pacific ocean, and it’s only about 16 kilometers square.

人迹罕至的岛屿是一座死火山， 周围环绕着南太平洋中部的陡峭悬崖，面积只有约16平方公里。