butadience丁二烯

一种由丁烷和丁烯制得的无色可燃气体。一般用来制造合成橡胶。

• footstep
• for
• forbid
• force
• fore
• forecast
• forefinger
• forehead
• foreign
• foreigner
• foremost
• foresee
• foreseeable
• forest
• forever
• forge
• forget
• forgetful
• forgive
• fork
• form
• formal
• format
• formation
• former