flyboat

1.The flyboat was exceptionally long compared with its width, had a flat bottom, and was lightly built.

这种艇船身长度大大超出其宽度，底平，体轻。

2.It became evident that the flyboat could be used advantageously in certain bulk trades where the danger of piracy was low.

显而易见，艇适于海盗劫掠可能性低地区一些大宗贸易使用。