Gramma --There are now,three times as much cotton this year as we did in 1949 我们城里的学校比1949年增加了两倍。 --After the technical innovation,there were only one-tenth as many drill breakage as before. 技术改革以后，钻头损坏率减到原来的十分之一。 --The new power station cost 80 per cent less than the one built earlier. 新电站比早些时候建成的电站建筑成本降低白分之八 十。 --There are now, three times as much cotton this year as we did in 1949. 我们城里的学校比1949年增加了两倍。 --After the technical innovation, there were only one-tenth as many drill breakage as before. 技术改革以后，钻头损坏率减到原来的十分之一。 --The new power station cost 80 per cent less than the one built earlier. 新电站比早些时候建成的电站建筑成本降低白分之八 十。 Grammar