The dreamer, the joyous oarsman, lay on his back at the bottom of the boat, his heels in the air.

那个梦中人，那个快乐的划手，仰面躺在船底，四脚朝天。

youdao

Water swilled around in the bottom of the boat.

船底上的水来回晃荡。

《牛津词典》

Water was slopping around in the bottom of the boat.

船底有水在晃荡。

《牛津词典》

The ships cook sat in the bottom of the boat.

VOA: special.2010.03.06

They clean the bottom of a boat.

VOA: special.2010.05.16

Briney then chucks the Asian bighead carp onto a slimy heap of others writhing on the bottom of the boat.

FORBES: Lucky Catch

Eventually the younger fisherman spotted their net, entangled were flounder, pike-perch, bream and one very large carp, all tossed into the bottom of the boat, flapping and gasping.

CNN: All alone on the shores of the Aral Sea

Armed with a wood chisel and a hammer, Sherman spent four hours carving a hole in the bottom of the plywood-and-fiberglass hull, which was now the submerged boat's top deck and visible to any passing vessels.

CNN: Shipwreck survivor recounts drama on high seas