鱼的腹鳍a fish's ventral fin腹鳍 对应着四足动物的后肢.Ventral ( or pelvic ) fins correspond to the hind limbs of a quadruped.这快速流动的气流为腹鳍提供了额外的升力.This faster - moving air provides the pelvic fin with additional lift....
Infrared detectors have many uses.红外探测器有多种用途。The report advocated that all buildings be fitted with smoke detectors.报告主张所有的建筑物都应安装烟火探测器.This is heady wine for experimenters using these neutrino detectors.对于使用中微子探测器的实验工作者...