汽车、火车、飞机、轮船是当代的主要运输工具的翻译：Cars, trains, planes, ships were contemporary of the main means of transport 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Cars, trains, planes, ships of the principal means of transport

Cars, trains, planes, ships were contemporary of the main means of transport

The automobile, the train, the airplane, the steamboat are the contemporary main transport means

motor vehicles, trains, airplanes, ships are contemporary main means of transport

Cars, trains, planes, ships were contemporary of the main means of transport