He used to walk on a tight-rope across the Niagara Falls.
他走在一条绷紧的绳子上横穿尼亚加拉大瀑布。
2
Sandburg and lindsay walked the tight-rope; if the tension of their verse slackened; they were precipitated into extremes of prosiness or sentimentality .
The trained dancer must not only have grace and elegance, but also the leap of an Olympic hurdler, the balance of a tight-rope walker and panther-like strength and agility.