Mechanism
n.[生]机制，机能，[乐]机理；（机械）结构，机械装置[作用],
（故事的）结构；[艺]手法，技巧，途径；机械作用

A bomb has been detonated by a special mechanism.
炸弹由一个专门装置引爆。
There's no mechanism for punishing arms exporters who break the rules.
对违规的武器出口商实施惩罚尚无执行机制。
A survival mechanism, a means of coping with intolerable stress.
一种生存机制，一种应对无法承受的压力的方法

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Obligation
n.义务，责任；证券，契约；债务；恩惠

When teachers assign homework, students usually feel an obligation to do it...
老师布置作业时，学生通常认为完成作业是一种义务。
I have an ethical and a moral obligation to my client.
我对我的当事人负有道义上的责任。
You can review your policy in detail for a full 15 days without obligation.
您可以在15天的免费体验期内仔细审核保单细则。

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Petition (pp. & pt.petitioned)
n.请愿书，；请愿，请求；上诉状
vi.祈求，请求；请愿
vt.（向法庭）申诉

We recently presented the government with a petition signed by 4,500 people.
最近我们向政府递交了有4，500人签名的请愿书。
His lawyers filed a petition for all charges to be dropped...
他的律师提请撤销所有指控。
Twenty-five of his supporters petitioned him to restore the monarchy...
他的拥护者中有25个人请求他复辟。

剧情百科

好吧，从中枪到躺下这一短暂的过程，Sherlock足以在他的思维殿堂想到许多情事，1秒能扩张到3分钟。情节中告诉我们正确的中弹迹象和如何能在短时间内处理好该处理的问题，这都是我们可以学到的，当然不是让你们去中枪，只是告诉你们，临危不惧！

考考你 Q&A
Q: Please use the word or phrase you just learnt to complete the sentence beblow.

1.Body temperature can _____ if you are ill.
人患病后体温可能会上下波动。
2.Her speech showed great maturity and _____.
她的演讲思想高度成熟，并且洋溢着博爱精神。

A:本期答案见下期
上期答案：

1.The following year Parliament voted to abolish the death penalty for murder...
议会于翌年表决对谋杀罪废除死刑。
2.He argued that the economic recovery had been facilitated by his tough stance.
他认为他的强硬立场推动了经济的复苏。