The hurdler paws the lead foot down to the track as he clears the hurdle, with the foot still dorsiflexed.
跨栏者过栏后脚掌抓地，此时仍然保持自然弯曲状态。

Bobsledding involves descending down an icy track in a bobsled cart with two or four people sitting inside.
雪车比赛是由二或四人乘坐在雪车内由冰道内滑下。

The Nazi authorities were in the habit of sending agents into Switzerland to track down the assets of German Jews.
纳粹当局惯于派遣特工进入瑞士追寻德国犹大人的资产。

Anyone can buy a man a gold watch; but it takes a generous wife to do what one lately did, and track down an antique gold strap which precisely fits the old one he inherited from his beloved father.
任何女人都可以给丈夫买块金表，但慷慨的妻子在不久前做那件事的同时，还要为他从敬爱的老爸那儿继承过来的旧表物色一条与之匹配完美的旧式金表带。