The numerical results indicated that the depressed bumper height can reduce the risk of lower extremity injury.
研究结果表明，适当降低保险杠高度，可减少行人下肢损伤风险。
The optimal sequence of surgical repair for lower extremity injury with associated vascular injuries is unclear.
治疗下肢合并血管伤的最佳手术顺序目前仍无定论。
The mechanism of lower extremity injury is a very complex problem and many problems still need to be studied about it.
下肢损伤机理非常复杂，有些问题仍然有待进一步研究。
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