playv.玩；比赛；（在运动队中）担当；派...出场；带；踢；击（球）；走（棋子）；出牌；演奏；播放；扮演；假装；上演；发挥（作用）；应付；处理；掠过；浮现；使轻快地活动；（喷泉）喷涌；做游戏n.游戏；戏剧；比赛；发挥作用；玩笑；间隙；闪烁；闪现playshoen.游乐鞋；轻便鞋

1. We must keep down the cost of production.
   我们必须降低成本。
2. Cocoons mission difficulty tuned down.
   降低了消灭虫茧的任务难度。
3. I am not the sort person to be put down.
   我不是那种任人贬低的人。
4. He's always running down his wife's cooking.
   他总是贬低妻子的烹饪技术。
5. The electrician took the houselights down.
   电工将剧场中观众席上的灯光减弱了一点。
6. I don't think that will cool his eagerness down.
   我并不认为那会使他迫切的心情有所减弱。
7. We have narrowed down the list to four candidates.
   我们把范围缩小到四位候选者身上。
8. She is managing to keep down her spending.
   她在设法缩小开支。