ballast

州际公路是连接不同州的主要高速公路。

A drone is an unmanned aircraft or ship that can navigate autonomously or be guided by a remote control. It is also used to describe a continuous low humming sound or a monotonous way of speaking.

直升机是一种利用旋转机翼提供升力和动力的飞行器。

A person who uses a boat for recreation, travel, or sport, or a stiff straw hat with a flat crown and brim traditionally worn by men. In modern usage, it primarily refers to individuals involved in maritime leisure activities.

汽车的外部结构或一种手部物理疗法。

指汽车引擎盖，也就是覆盖发动机的金属盖。它也指一种过去女性或儿童戴的、在下巴下系带的帽子。

一种用于普通骑乘或驾驶的中型马，或供出租的马车。

平台是人们站立的加高平面，常见于火车站。

车辆是用于运输的机器。

Bimini 是船上驾驶舱的一种帆布遮阳篷。