I can only afford to watch television for an hour gonight because I have homework to do.
因为我要做家庭作业,所以今晚我只能花一小时看电视。
when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitiv
计算机可以使办公室人员和会计免除那些枯燥、重复的劳动。