The lamp, the fixture, and the room, all three must work in concert for the true benefits of end-users.
灯、固定装置和房间，三者必须协同工作，才能真正造福最终用户。
2
Even though you save on kerosene, it takes more than three years after purchase for the total cost of running a compact fluorescent lamp to drop below that of a kerosene lamp and fuel.
如果不用煤油灯，节省下来的灯油钱，要三年才抵得上购买一个紧凑型灯的花费。
3
By the glow of a small carbide lamp one could distinguish a dozen human figures gathered around three or four tables.