悬臂起重机提升和移动重物的机器，它由一个带有缆绳和滑轮的可移动的、并与一根由向上静止横梁的底座连接的起重杆组成
A machine for hoisting and moving heavy objects, consisting of a movable boom equipped with cables and pulleys and connected to the base of an upright stationary beam.
浮舟用于支撑浮桥的船只，可以轻易移动的建造物，如平底船
A floating structure, such as a flat-bottomed boat, that is used to support a bridge.
木材堵塞一堆挤在一起的、无法移动的飘浮的原木
An immovable mass of floating logs crowded together.
然后来了一股迅速移动的冷锋。
Then along comes a rapidly moving cold front.
