1. 木筏：timber fender ==> 防撞护木,木围墙 | timber float ==> 木筏 | timber floating ==> 木材浮运
1. There had to be a significant amount of water in this area, water high enough to lift that railroad tie sized piece of timber and float is perhaps several miles.
必须有大量的水在这方面，水高到足以解除该枕木大小一块木材和浮动也许是几英里。
2. A piece of worthless timber may itself somehow float across the water, but it sinks even under the weight of a bird.
一块毫无价值的木料会不知何故地在水面上瓢来飘去，但它连一只鸟的重量也承受不住。