您要查找的是不是：
- Pieces are placed onto gravity roller conveyor 重力辊式输送机
- Huge rollers broke on the beach. 巨浪冲击着海滩。
- We are fully aware of the gravity of the situation. 我们十分清楚形势的严峻性。
- Moon's weak gravity let the gasses slip away into space. 月球的微弱引力允许气体逃到太空里去。
- Jupiter, with august gravity, sitting in the midst. 朱庇特威风凛凛地坐在当中。
- The stone rolled down the hill by gravity. 石头在重力作用下向山下滚去。
- What is the force of gravity at sea level? 海平面的地球引力多大?
- The ride on the roller coaster dizzied us. 乘坐云霄飞车使我们头晕。
- He could hardly keep his gravity. 他忍不住要笑出来。
- May I borrow your roller skates? 我可以借你的旱冰鞋吗？
- She does not know the gravity of her illness. 她不知道自己病情严重。
- Clattering along on roller skates. 踩着轮式溜冰鞋行进
- The force of gravity pulls things towards the earth's centre. 地心吸力把物体吸向地心。
- The huge machine was moved to its new position on rollers. 那台巨型机器用滚柱移到了新的地方。
- A road roller is used in making and repairing roads. 压路机是用来修筑道路的。
- He doesn't seem to understand the gravity of the situation. 他似乎没有意识到形势的严重性。
- gravity rollers 滑动滚柱
- A steel tube or wooden roller on which the warp is wound in a loom. 卷轴织机上的铁管或木轮，供经线缠绕之用
- He discoursed impressively on Newton's theory of gravity. 他讲述了牛顿的引力定律，给人以深刻的印象。
- A rock falling to the ground is an illustration of gravity. 石块落地是地球引力的一个实例。
