1981年，新型的日产汽车平均每升汽油能跑13千米。New Japanese cars averaged 13 km to the litre in 1981.那里的通勤一族平均上下班要花5个小时。The average commuter journey there is five hours long.1970年，法国农场的平均规模为19公顷。In 1970 the average size of a French farm was ...
They are uncertain about what to do next.他们不知道下一步该做什么。For a minute he looked uncertain, and then recovered his composure...有一小会儿他看上去有些迟疑不定，之后又恢复了镇定。Students all over the country are facing an uncertain future.全国各地学生前途未卜。...