2 Some chemicals are flammable - ie. they burn in the presence of air.
2 Some chemicals are flammable - ie. they burn in the presence of air.
某些化学品是可燃的，例如：它们在空气中燃烧。
2 Some chemicals are flammable - ie. they burn in the presence of air.
某些化学品是可燃的，例如：它们在空气中燃烧。