river crossing pit 河流穿越坑
Some birds traverse the Sahara and the Mediterranean Sea in a one go, while others make a pit-stop in northern Africa before crossing.
有些候鸟一口气横穿撒哈拉沙漠和地中海，而有些则在穿越前在北非稍作休整。
Fanciers of muscular hounds with big jaws could circumnavigate the law by crossing, say, a mastiff with a pit bull, to create a perfectly legal canine nasty (as, indeed, has happened in Britain).
大下巴肌肉猎犬的爱好者们可以通过一只马士提夫獒犬和一只罗威那犬制造一只完全合法的令人讨厌的犬种来绕开法律。
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