by boat的用法和样例：
例句
- This island is accessible only by boat.
这个小岛只能坐小船去。 - They travelled by rail to the coast and thence by boat to America.
他们乘火车到海岸，再从那里乘船去美国。 - I'll go by boat one way.
我单程坐船去。 - We'll get there somehow, by boat or otherwise.
我们总要设法去那里的，乘船也好，用其他办法也好。 - They traveled by train to the coast and thenceforth by boat to China.
他们乘火车到海岸，再从那里乘船到中国。 - Are you going to America by boat or by plane?
你到美国是坐船还是坐飞机？
