The raft was buoyed up by empty petrol cans.
这木筏依靠空汽油桶的浮力漂浮。
The raft would be more buoyant if it was less heavy.
木筏若轻一点浮起的就更好了。
They must think you are a madman if you tell them you want to cross the Pacific on a raft.
如果你告诉他们你要乘木筏横渡太平洋, 他们一定会认为你是个疯子。
