常见例句雙語例句The jaws of the bucket opened; the bulldozer retreated on its caterpillar treads and almost flipped over as it was suddenly lightened of its load.鏟車上下頜張開，踩著履帶後退。它是如此輕快的後退著好像突然卸去了重負。 返回 caterpillar bulldozer