如何区分include和involve

include:
1)if one thing includes another,it has the second thing as one of its parts:包含,包括（某样东西是另外一样东西的一个部分,是一种包容关系）
The tour included a visit to the Science Museum.旅行项目包括参观科学博物馆.
Does the price include tax?这个价格含税吗?
同义词：comprise
involve;
1.if a situation,an event or an activity involves sth,that thing is an important or necessary part or result of it.SYN ENTAIL:这种包含带有某事“很重要、有必要,不可避免,牵涉到”之类的意思：同义词：entail
比如：Any investment involves an element of risk.任何投资都有一些风险.
Many of the crimes involved drugs.很多犯罪都和毒品有关.
The test will involve answering questions about a photograph.测验内容包括就一张照片回答问题.
The job involves me travelling all over the country.或The job involves my travelling all over the country.这一工作要求我在国内各地旅行.
2.if a situation,an event or an activity involves sb,they take part in it or are affected by it:参与,连累,影响到.
例：There was a serious incident involving a group of youths.
How many vehicles were involved in the crash?