您要查找的是不是：
- That is actually a cavity in the earth. 那其实是一个地下洞穴。
- It is possible to transmute one form of energy into another. 把某种形态的能量改变成另一形态的能量是可能的。
- Young people usually have more energy than the old. 青年人通常比老年人精力充沛。
- A cavity or hollowed surface, especially of a bone. 腔尤指骨头的腔或凹陷的表面
- The industry felt the effects of the energy crisis. 该工业受到能源危机的影响。
- The cavity formed by this structure. 盆腔由这种骨骼结构形成的体腔
- I rallied all my energy for further effort. 我振作精神以做再次的努力。
- Kinetic energy is the energy arising from motion. 动能就是由于运动而产生的能量。
- Solar energy is a new kind of source of energy. 太阳能是一种新型能源。
- It is important to conserve energy. 节省能源十分重要。
- I have a toothache because there is a cavity in one of my teeth. 我牙疼，因为我的一颗牙齿上有个洞。
- Nuclear energy remains a double-headed creature. 核能依然是一种有利也有弊的能原。
- As a matter of fact, light is a form of energy. 其实，光是能的一种形式。
- The move water have mechanical energy. 流动的水拥有机械能。
- Who discovered the conservation of energy? 谁发现了能量守恒？
- The sun is the ultimate source of energy. 太阳是能量的最基本来源。
- We can use solar energy to do many things today. 如今，我们可以利用太阳能做很多事情。
- Kept the thermostat lower to conserve energy. 减少自动调温机的使用以节约能源
- The peritoneal cavity is a potential space. 腹腔是一个潜在的间隙。
- The need to economize scarce energy resources. 节约使用稀有能源的必要性
