a casual ward的用法和样例：
- A casual ward will often admit a hundred tramps in one night, and these are handled by a staff of at most three porters.A hundred ruffians could not be controlled by three unarmed men.
- The plan grew out of a casual conversation.
- He cut a casual figure in a job that paid$30,000 a month.
- John is a casual; he can't find a proper job anywhere.
- A casual newspaper reader wouldn't like articles on politics everyday.