by plane的同义词是by air、by airplane。
adv.搭飞机
【例句】
1. She left by plane for Berlin.
她乘飞机去柏林了。
2. Are you going out by plane or by ship?
你是搭飞机还是乘船出国?
3. I would rather travel by train than by plane.
我宁愿乘火车也不愿乘飞机旅行.
4. They reached Paris by plane on March 8.
他们于三月八日乘坐飞机到达巴黎.
5. We'll leave for Guangzhou by plane.
我们将乘飞机去广州.