“touch and go”不是“摸了就走”，而是（形势）不确定的；一触即发的形势；危险的；不确定的事态；无法预言的事。

【例句】
Trade talks between the two countries have been touch and go.
两国之间的贸易会谈一直处于不稳定的状况。

The doctor says that it's touch-and-go whether Mary will be okay.
医生说玛丽能否挺过去还很难说。