使役的

There is also an informal network of connections that enables a general to call a scientist to get his son admitted to an institute, a scientist to wangle a return draft deferment, or a movie scriptwriter who has produced a good spy film to call the security services to get permission for his wife and daughter to travel to the west.

还有一种非正式的关系网，凭借这种关系网，可以使一位将军要求一位科学家把他的儿子录进大学。作为报答，这位科学家又可以骗得缓役证。凭借这种关系，一个曾经写过有名的反特电影的电影剧本作者可以让安全机关为他的妻子和女儿搞到去西方国家旅游的许可证。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。