カーテンは、難燃材で作るべきだ。

Excite!&@nifty: It is necessary to make the curtain from the fire retarding material.
Livedoor: You should make curtain with a fire retarding material.
Yahoo!: You should make the curtain with incombustibility materials.
OCN: A curtain should be made with an incombustible material.
BabelFish: The curtain should be made with the fire retarding material.
Google: Curtain is in the fire retardant should make.
Bing Translator: The flame retardant material makes ought curtains.