The path steepens as you climb the hillside.

沿着山坡往上爬时，那条小径越来越陡。

A compression wave in decelerating flow steepens.

压缩波在减速流中变陡。

In particular, as the yield curve steepens, the commodity bubble can burst. The stock market will probably come down last.

尤其当收益曲线趋于陡直，初级产品泡沫就可能破裂，股市下跌可能最后发生。