海龙卷

Be- hind these stood two old trees: they were nearly alwaysleafless,and one could easily believe that a wind storm or a water-spout had strewn them over with great clumps of manure, but every clump was a bird's nest.

它们几乎一年四季都是光秃秃的。你很可能以为有一阵暴风或者海龙卷曾经卷起许多垃圾撒到它们身上去。不过那一堆堆垃圾却是一个鸟雀窝。

I grabbed the controls and prepared to turn out of the way, for this was the latitude of waterspouts.

我抓紧操纵杆，准备躲开它，因为目前的飞行高度正好是海龙卷的高度

I grabbed the controls and prepared to turn out of the way, for this was the latitude of waterspouts.

我抓紧操纵杆，准备躲开它，因为目前正好处于海龙卷出现的纬度

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。