由于严重的干旱，今年均小麦产量从1000吨减到800吨。
Because of the serious drought, the wheat output this year decreased from1000 tons to800 tons.
这个港口每年货物吞吐量达1亿吨。
This port handles 100 million tons of cargo each year.
这辆卡车最大载重量是一吨。
The maximum load for this lorry is one ton.
