懸臂起重機提升和移動(dòng)重物的機器,它由一個(gè)帶有纜繩和滑輪的可移動(dòng)的、并與一根由向上靜止橫梁的底座連接的起重桿組成
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.
浮舟用于支撐浮橋的船只,可以輕易移動(dòng)的建造物,如平底船
A floating structure, such as a flat-bottomed boat, that is used to support a bridge.
木材堵塞一堆擠在一起的、無(wú)法移動(dòng)的飄浮的原木
An immovable mass of floating logs crowded together.
然后來(lái)了一股迅速移動(dòng)的冷鋒。
Then along comes a rapidly moving cold front.