join加入組織,團體,黨派等,有作為其中的一個成員的含義.join也可以加人,表示和某人一起參加某活動.既join sb.in (doing) sth.如：It's two years since he joined the club.Will you join us in the discussion?而join in 則是加入一種具體活動,如：join in the search join in the group singing (注意,有別于join the singing group 這個是組織 ) take part in 指參加會議或群眾性活動等,著重說明句子主語參加該項活動并在活動中發(fā)揮作用.如：We'll take part in social practice during the summer vacation.The Swiss didn't take part in the two World Wars.參加廣播站應(yīng)該用join