We need to do lots of laundry. Do we have enough detergent?
咱们得洗好多衣服呢。有足够多的洗涤剂吗?
He should meditate on the problem.
他必须就那个问题好好地想一想。
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