1.feed on 以......为食;以......为主食
The caterpillars feed on a wide range of trees, shrubs and plants.
毛虫以各类树木、灌木和植物为食
。2.on top of 在......上面;在......之上
The park lies on top of a coalfield.
公园位于一片煤田上.
3.decide to 决定去做;决定要
If the Conservatives got in they might decide to change it.
如果保守党赢得选举,他们可能会决定改变这一现状
。4.be lined with 排列;排列着
The walls would be lined with books and periodicals.
这几面墙会摆放书籍和期刊.