关于by sea的问题.比如说：by sea/by air /by land等,by前面要加定冠词吗?

关于by sea的问题.比如说：by sea/by air /by land等,by前面要加定冠词吗? at sea ,by sea ,at the sea,in the sea 的意思,at sea ,by sea ,at the sea ,in the sea 的意思 will you travel by sea or by air的意思! by sea是设么意思 海边 英语by sea or by the seaTom lives__________ (by sea /by the sea) by land,by sea,by air这样的表达地道吗? 一个英语短语的解释----在线等---by sea = by ship by air = by plane by road 相当于by car 还是by bus 还是别的. near the sea 还是by the sea 为什么坐船用by sea不用by the sea JULIANTOS BY THE SEA怎么样 PLCHITTTAGONG SEA PORT BY VESSEL will you travel by sea or air?和will do travel by sea or air?哪一句是对的 BY SEA 与BY SHIP 有什么区别? 求翻译.By treating sea water. MOZZARELLA BY THE SEA AT MAHARTA怎么样 very soon, its body was dragged by the killers down into the depths of the sea.句中the depths of的depth为什么加S? 关于with time going by后的时态问题with time going by 后可不可以加现在完成进行时? 关于carry out的句子翻译He found himself carried out to sea by a strong wind.这句里的carry out怎么理解啊?