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....
霍尔小姐点名后把它们一一划掉。Miss Hoare called out names and marked them off.我们每天早上都得站在雪地里等着点名。We had to stand in the snow every morning for roll call.早晨7点钟点名。Roll-call will be at 7 a.m....
The hijacker gave himself up to police, who are now questioning him.劫持者向警方自首了，目前警方正在审讯他。The hijacker comman-deered the plane on a domestic flight.劫机者劫持了这架国内客机。I've never heard of a hijacker Ietting passengers deboar...