He’ll have to be on his mettle if he wants to win the next race.
他如果想赢
下次比赛,

力以赴。
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-综合 This has been bearing fruit: violence is down in Helmand and Kandahar provinces; better-trained Afghan troops are proving their mettle against the Taliban; surveys of Afghan opinion suggest that the Taliban's popularity has fallen dramatically.


力已有成效:赫尔曼德省和坎大哈省
暴力冲突减少;更加训练有素
阿富汗军队在与塔利班
战斗中勇气十足;阿富汗民调显示塔利班支持率骤降。