[scode type="blue"]demented[/scode]
音标：
/dɪ'mentɪd/
英英释义：
①Someone who is demented has a severe mental illness, especially Alzheimer's disease.【adj.精神错乱的;（尤指）患早老性痴呆的】
②If you describe someone as demented, you think that their actions are strange, foolish, or uncontrolled.【adj.古怪的;愚蠢的;疯狂的】
例句：
①At what point does it become necessary to place a demented person in a nursing home?
到了什么时候算是有必要把早老性痴呆病人送到养老院去？
②Sid broke into demented laughter.
锡德狂笑起来。
电影《纽约的一个雨天》：
[scode type="blue"]off air
（广播、电视节目）不在广播中；（发生）在播送节目之外[/scode]
英英释义：
In radio or television, when a programme goes off-air or when something happens off-air, it is not broadcast.
例句：
①When I get off air around 2am my neck and shoulders are locked with tension.
我凌晨两点结束广播时脖子与肩膀绷得紧紧的。
②The argument continued off air .
这场争论下了节目之后仍在继续。
《金融时报》一篇题为 China bars BBC world news channel amid media dispute 也出现了这个表达：
电影《我是山姆》出现了“on the air”表示“在录”
其实这两个短语都挺高频的，源于“air ”作为动词，本身可以表示“（通过电视或无线电）播送，播放 ”【If a broadcasting company airs a television or radio programme, they show it on television or broadcast it on the radio.】
栗子：
Tonight PBS will air a documentary called 'Democracy In Action'.
