The sight of one of them leaning precariously over the building 's roof edge while using a stone-cutting machine made me feel queasy .

有一名工人很危险地靠在屋顶边缘操作切割机，我看了很不舒服。

Extreme artists balanced precariously over a cliff .

极限艺术家悬崖边玩命地保持平衡。

Lie precariously at the edge of the mattress and fume if you must , but lie in the same bed .

你可以侧身躺在床的边沿，你也可以发火，但要躺在同一张床上。

Being a precariously dominant minority is a difficult position for human nature to cope with .

作为一个受人统治的少数民族来说，人性问题是很难处理的。

For the rest of the journey I sat precariously on the roof of the cabin .

在以后的航程中，我就一直提心吊胆地坐在船舱的顶上。