摇摇欲坠

The phone was perched precariously on the window ledge.

电话放在窗，欲坠。

The boat was tied up alongside a crumbling limestone jetty.

这条船停泊在一个欲坠的石灰岩码头边。

By 1740 European feudalism was in its death throes.

到1740 年， 欧洲的封建义欲坠。