assignment
单词辨析：
通常指对某人担任某一职务的不经选举的任命。
The appointment of John as chairman of the meeting will be announced tomorrow.
约翰任大会主席的任命将于明日宣布。
What do you think of the appointment of a new foreign minister?
你对任命新的外交部长一事有何看法？
指职务、任务、工作等的分派。
Her assignment to other duties was decided.
她担任的其他职责已经定了下来。
When was she informed of her assignment as manager of that new department?
她何时得知已被指派为那个新部门的经理的？
指为了某一特定目的的指派。
The designation of Jim as our new teacher will be announced soon.
吉姆被指派为我们的新老师的事很快就会宣布。
The designation of the newcomer for the post is known to all.
大家都知道这个新来的人将担任该职务。
可指雇主、老师、父母等分派给的任务，有时也指自愿承担的工作，常含较为艰巨或令人厌烦之意。
The boss forced this difficult task upon him.
老板强迫他干此苦差事。
I set myself the task of chopping up the firewood.
我给自己安排了劈柴的任务。
The teacher assigned each of them a holiday task.
老师给他们每个人都分配了假日的任务。
较正式用词，指分派的工作任务或指定的课外作业。
He was sent abroad on a difficult assignment.
他被派出国执行一项艰巨任务。
The reporter took on the assignment with great zeal.
那位记者非常热情地去执行这项任务。
Today's assignment is to draw a horse in motion.
今天的作业是画一匹动态的马。
相关例句：
A conference in guilin! what a great assignment!
你去桂林开会，这可是一趟美差！
Let's work on the following assignment: a company has employees and consultants.
设想我们被分配了这样一个任务：一个公司有雇员和顾问。
I hate to interrupt your intimate conversation but we do have an assignment to discuss.
我实在不愿打断你们的私人谈话，但是我们确实有事要谈。
She's going to India on a special assignment for her newspaper.
她受委派到印度去执行报社的一项特殊任务。
The assessment for the course involves written assignments and practical tests.
这门功课的考核包括书面作业和实际操作考试。
Routing and wavelength assignment problem is a key problem for WDM optical networks.
路由与波长分配问题是波分复用光网中的一个关键问题。