The propeller shaft may be solid or hollow, protected by an outer tube or exposed.

It requires a positive, a core made of refractory material and an outer layer of wax.

用耐火材料做成实心的正像, 外面覆以蜡层.

In fact, it was originally a solid rock.

其实, 这螺壳岩里面本来是实心的.

If a steel ship were solid throughout, it would sink into water.

假如钢船是完全实心的, 它就会沉入水中.

No. I fell right onto a concrete sidewalk.

不.我直接掉到了坚硬的人行道上.

Houses must be bulit on solid ground.

房屋必须建造在坚硬的土地上.

Mechanics includes the properties and laws of both solids and fluids.

力学既研究固体的也研究流体的性质和定律.

The solid and liquid waste are separated before being recycled.

液体的和固体的废料在需要在回收前分开.

The crosscorrelation technology was used to measure solid velocity.

采用互相关技术测量固体的流速.

Gravity acts on the center of any solid object.

重力作用于固体的重心.

The downward velocity of solids is sufficiently high.

固体的向下速度相当高.

Unbreakable PC Container, users could benefit from more cost-effective and guarantee quality.

耐用的PC容器也是质量和效率的保证.

At present, quality requirements and durable books use of sewing.

目前, 质量要求高和耐用的书籍多采用锁线订.

Robust body with raised seating surfaces ground to mirror-like finish.

坚固耐用的阀体,配置具有研磨镜面光洁度的凸面阀座表面.

All contained in a durable carrying case with room for tools.

所有组件都装在坚固耐用的盒子内,盒内还预留空间用于存放工具.

I would recommend starting with something durable , strong and that turns well.

我推荐开始用一些耐用的, 高强度的并且转的灵活.

Fences must be sturdy, tight.

围篱必须是牢固耐用的.

This raincoat is made of very durable material.

这件雨衣是用非常耐用的料子做的.

'Repression is the only lasting philosophy.

“ 镇压是唯一经久耐用的哲学.

Anyone of right mind would have considered it a ghastly joke.

任何大脑健全的人也许都会把它看成一种可怕的玩笑.

The vigorous, the healthy, and the happy survive and multiply.

强壮的 、 健全的和幸运的总会生存,还能够繁殖.