When he saw how the theory increased unemployment, he underwent quite a conversion.
当他看到这个理论加重了失业后，他彻底改变了看法。
The population in this area has increased fourfold.
该地区的人口已增加到四倍。
They increased ventilation by opening the top center part of the carriage window.
他们把车厢上面的中央部分打开以增进空气的流通。
