Suddenly the snow gave way beneath his fore legs and he sank down.
突然间，它前爪踩到的雪沉了下去，自己陷了进去。
The movement of the fore and hind legs should reach equally forward in the moment of the extension.
前后和后肢的动作在伸长的瞬间应当是均等的。
The movement of the fore and hind legs should reach equally forward in the moment of the extension.
前后和后肢的动作在伸长的瞬间应当是均等的。
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