The dam harnesses the energy of the river.水坝利用水的能量.Gyms usually provide ropes and rent shoes harnesses and belaying devices.攀岩场通常会提供绳索以及出租攀岩鞋、安全带跟确保装置.These include dobbies, cam motions, electronic Jacquard machines and ...
The holes are only borings, less than a foot in diameter.油井仅仅是一些钻孔, 其直径不到一英尺.These borings consist of rock fragments, ash coal and other materials.这些孔屑包括石头碎片 、 灰尘、煤渣和其他东西.Based on thermodynamics principle, the feasibilit...