在: exist; be living某时: sometime; somewhen到达: arrive; get to; reach在(某时间)有约会: have an appointment at某时: sometime; somewhen 新学员将于下周某时来校。 new students will come to our school sometime next week在…能到达的地方: within touch of在: Ⅰ动词1.(存在; 生存) exist; be living 精神永在。 the spirit still exists. 我父母健在。 both of my parents are living now.2.(表示人或事物的位置; 留在) stay; remain 在领导岗位 be in one's power; 我父母在北京。 my parents are in beijing. 你的书在桌子上。 your book is on the table.3.(参加; 属于) join or belong to an organization; be a member of an organization 在组织 join an organization4.(在于; 决定于) depend on; lie in; rest with 事在人为。 human effort is the decisive factor. 企业兴衰主要在经营管理。 the uprising or downfalling of an enterprise lies in its management or administration. 事情的成败在你自己的努力。 the success or failure of the matter depends on your own effort.Ⅱ副词(正在) in process of; in course of 一切都在变。 all are changing. 老师在备课。 the teacher is preparing the lesson. 他们在聊天。 they're having a chat.Ⅲ介词(表示时间、处所、范围等) 在半夜 in the midnight; 在礼堂开会 have a meeting in the auditorium; 在车站 at the station; 在这种情况下 under these circumstances; 坐在我右边 sit on my right; 在战争中 during the war; 在整个历史上 throughout history; 在理论上 in theory; theoretically; 在这方面 in this respectⅣ名词(姓氏) a surname 在育zai yu到达: arrive; get to; reach 到达顶点 come to a head; 到达饥饿点 reach the point of starvation; 他们昨天到达北京。 they arrived in beijing yesterday.; 到达港 port of arrival; port of destination; 到达日 date of arrival; 到达时间 time of arrival; 到达站 destination; (列车) 到达站台 in-track platform; 到达重量 arrived weight; landed weight从某时持续到某时: last from从某时刚: date from定在某时: be schedule for定在某时(进行): be schedule for贯穿某时间: throughout the specified time火车在(某时)离站: the t aqyh rain lzves the station at..., the train is due out at..; the train leaves the station at..., the train is due out at..每次, 在某时: at a time某时某地: somewhere out there四月的某时: sometimes in april在某时候: sometimes ad表示某时刻,选用: at从某时刚开始: date from从某时期开始: date from自某时代至今: go back to a certain time在……北部,在……以北: in/to the north在……顶端,在……上面: on toof = at the toof在……之前,在……前头: ahead of