折叠或双折：将某物折叠或双折。
将（卡片）翻面朝下：将一张卡片翻面朝下。
调低（音量、强度等）：通过调节控制器将音量、强度等降低。
拒绝接受：拒绝接受某事物。
可折叠或双折：某物可以被折叠或双折。
turn down // [ turning turned turns ]
动词词组 If you turn down a person or their request or offer, you refuse their request or offer. 拒绝
I thanked him for the offer but turned it down.
我感谢他的好意，但拒绝了他。
动词词组 When you turn down a radio, heater, or other piece of equipment, you reduce the amount of sound or heat being produced, by adjusting the controls. 调低 (音量或热度)
He kept turning the central heating down.
他不断地调低中央暖气系统的温度。
the act of refusing an offer
同义词： nonacceptance / turndown
take a downward direction
萧条；衰落，下降：
关小
... turn up 把音量开大，卷起，翻起，发生，出现，到达 turn down 关小/调低（音量／热度），拒绝 turn over 把……翻过来，翻动，犁翻（土地），细想 ...
... TV＝television n. 电视 turn down v. 关小；调低 racing n. 赛车(马)，是动词 ...
... turn up 朝上翻(出现,来到,,卷起,找到,被找到,,发生,把声音调高) turn down 关小,调低;拒绝 turn over 滚动(翻过来,营业额为,周转,移交,翻阅） ...
... turn up出现；开大；来到；到达 turn down关小；调低；拒绝；调小 turn over翻过来；移交；仔细考虑；翻身 ...
Could you please turn down the CD player a little?
你能把唱片播放机的声音关小一点吗？
Why did she turn down your invitation?
她为什么谢绝你的邀请？
You can't just turn down offers of work like that.
人家给你工作，你不能就那样一一谢绝呀。
When Hex gets offered the chance to clear his own name by stopping Turnbull from using terror to launch a new civil war, it is an offer the bounty hunter can not turn down.
VOA : standard.2010.06.20
So we'll have to turn down the other mike a bit.
必须把另一麦克风也调低点
博弈论课程节选 : 耶鲁公开课
or NYU or Harvard or Yale. I wouldn't turn down a job there.
纽约大学、哈佛大学或耶鲁大学教书。我肯定不会拒绝在这些学校里的工作。
SpeakingMax英语口语达人 : 什么事情都是可能的
I want to turn loose my hold on everything, and go sailing down,down, just like one of those poor,tired leaves."
VOA : special.2009.08.01
On this day, a line of 100 people waiting to turn in their cans snakes down the block.
VOA : standard.2010.02.23
Do you turn down all offers and risk losing him for nothing next summer?
WSJ: Soccer's Borussa Dortmund Faces Uphill Battle to Maintain Success
High-risk funds do well in up markets but get clobbered when stocks turn down.
Obama obviously understands this--which is why he has condemned the House's turn down the protectionist path.