attend、join、participate与take part in这些动词或词组均含“参加，加入”之意。
attend ：侧重参加或出席会议或学术活动等。
- The meeting was attended by 90% of shareholders.
90%的股东出席了会议。 - to attend a wedding/funeral
参加婚礼 / 葬礼 - We'd like as many people as possible to attend.
我们希望出席的人越多越好。
join ：普通用词，指加入党派、团体或游戏活动等。
- I've joined an aerobics class.
我参加了有氧健身班。 - She joined the company three months ago.
她三个月前进了这家公司。 - (figurative) to join the ranks of the unemployed
加入失业大军
participate ：正式用词，特指参加团体活动，暗示以一个积极的角色参加。
- We encourage students to participate fully in the running of the college.
我们鼓励学生全面参与学院的运作。 - He planned to participate in the demonstration, but then he got cold feet.
他打算参加示威，但后来临阵退缩了。
take part in ：侧重参加某项群众性、集体性的事业、工作或活动，突出参加者在其中发挥一定的作用。
- If you want knowledge, you must take part in the practice of changing reality.
你要有知识，你就得参加变革现实的实践。 - Amongst those who have travelled furthest to take part in the Festival are a group from Northern Ireland.
在那些不远万里赶来参加节日活动的人中有一群来自北爱尔兰。
