... sit on thorns 如坐针毡 sit on the rail骑墙 sit on the thin edge of nothing 坐的位子很窄,坐得很...
权威例句
1.
He would sitonthe porch, a cup of Red Diamond coffee ontherail, and stroke its beak, cooing to it, as if he wanted it to understand the awful sacrifice he was asking it to make.
NPR: Excerpt: 'The Prince of Frogtown'
2.
He found that a furniture maker near Elkhart would let cars full of wood siton tracks every year at the same time, clogging therail sidings.