He tried again and again to reach it, and at last tumbled in, heels over head!

他反复地试了很多次去够水喝，结果却掉进了井里，摔了个脚朝天！

But instead of sitting confidingly as my other visitors had done, he rushed off at once, nearly tumbling heels over head into the lake in his suspicious confusion, and with loud screams roused the neighborhood.

但他并没有像我的其他访客那样自信地坐着，而是立刻冲了出去，在他可疑的混乱中差点从头顶翻到湖里，大声的尖叫声惊动了附近的人。