It was thought that all frogs moved this way. They'd push off with their back legs, and then once in flight, rotate the limbs forward.

一般人们认为所有的蛙都是这样：它们后腿蹬地起跳，一旦升空，后肢前摆，前肢后摆，接着前肢先落地。

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When light finally came up, three of the armored vehicles were up-ended in huge crater holes and trenches out there, but the most important thing -- the fuel trucks rolled in, they were not hit, they were not harassed in any way and they managed to deliver their vital supplies, which means the Marines now can push forward.

CNN: Martin Savidge: 'Pitched battle that went on and on'