1·Hatchlings are simply too small to conserve body heat, even with insulation and countercurrent exchange systems.
刚孵出的小海龟太小了，即使有保温和逆流交换系统，也无法保持体温。
2·The leatherback is certainly not the only animal with such an arrangement; gulls have a countercurrent exchange in their legs.
当然并不只是棱皮龟有这种结构，海鸥的腿部也有一个逆流交换系统。
3·The leatherback accomplishes this by arranging the blood vessels in the base of its flipper into a countercurrent exchange system.
棱皮龟通过将鳍状肢底部的血管排列成逆流交换系统来完成这一过程。
4·The influences of column diameter and height on the countercurrent flotation process were discussed, and the new concepts of choked air bubbles and area load were put forward.
论述了柱径与柱高对逆流浮选柱浮选过程的影响，提出了气阻、面积负荷的概念。
5·A new method of tea extraction was introduced, and analyzed the process of countercurrent extraction.
介绍了一种茶叶浸提的新方法，并对逆流提取的过程进行了分析。