每日一词onset

1. 这是什么词？

词：onset

英英释义：the beginning of something, especially something bad

例句：Evidence shows that speaking a second language can help delay the onset of dementia.

2. 为什么选这个词？

“onset”是个名词，意思是“开始”，常常可以用来完美替换常见的“beginning”，是外刊中经常出现的表达。onset 表示“开始”时，后面常接有负向含义的名词，比如疾病、经济萧条、战争等。

比如战争开始后，犯罪率激增，就可以说成：

Since the onset of the war, the crime rate has skyrocketed.

有证据表明，会说一门外语有助于推迟老年性痴呆（dementia）。我们就可以用 onset 造句：

Evidence shows that speaking a second language can help delay the onset of dementia.

最近的《经济学人》中也出现了 onset：

The study adds substantial weight to the evidence linking cannabis to the onset of psychosis.（“the onset of psychosis”指“精神疾病的开端”，这句话是说研究表明吸食大麻很有可能导致患上精神疾病）

3. 怎样学会使用这个词？

a. [搭配]ADJ.

rapid, sudden 迅速开始；突然开始:

the sudden onset of the disease 疾病的突然发作

slow 缓慢的发作

early 早的开始

delayed, late 推迟的开始；晚的开始

b. [搭配]VERB + ONSET 

delay 推迟开始

mark 标志着开始:

His first hit record marked the onset of an astonishing career. 他的第一张风行一时的唱片标志着惊人事业的开始。

c. [搭配]PREP.

after the ~ 开始后:

after the onset of sleep 进入睡眠后

at the ~ 开始时:

at the onset of the war 战争开始时

before/prior to the ~, since the ~ 

开始前；自开始以来

1）翻译下面的句子：

经济危机爆发后，投资面貌发生了巨大变化。

（参考翻译：The investment landscape has been changed tremendously since the onset of the financial crisis.）

2）结合自己的生活、学习、工作、兴趣等，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。

例子1： You were supposed to see the doctor at the onset of a cold. 

场景 ：你开始感冒时就应该去看医生。

例子2: Regular exercise can delay the onset of old age. 

场景：经常锻炼可延缓衰老。

例句： the onset of the disease

The new treatment can delay the onset of the disease by several years. 

The drug must be taken from the onset of the infection.

The onset of depression often follows a traumatic event. 抑郁症 发作常常发生在遭受创伤之后。

He went to see the doctor at the onset of a cold.他开始感冒时便去看医生了。