1·For some time after his dangerous operation, Keren's life hang by a thread.
在手术后的一段时间，凯伦的生命都处于垂危之中。
2·The fire was approaching people's houses. people's lives and properties were hang by a thread.
大火向民房逼近，人民的生命财产危在旦夕。
3·Sew a small loop of thread to the back of the angel to hang her by.
在小天使的后备缝上根线，头上系成圈，挂着方便，也好让天使真的飞起来。