And Toad was a helpless prisoner in the remotest dungeon of the best-guarded keepof the stoutest castle in all the length and breadth of Merry England.
就这样，蟾蜍成了整个欢乐的英格兰国土上最坚固的城堡里最戒备森严、最隐密的地牢里一个可怜无助的囚犯。
2
He was careful to keep out of sight.
他小心翼翼地躲开别人的视线。
《牛津词典》
3
It's hard to keep track of the children's comings and goings.