natural form的用法和樣例：
例句
- This blue mould was in fact the natural form of penicillin which Fleming realized was an effective way of killing bacteria.
原來(lái)這些青色的霉斑正是青霉素的自然形式，弗萊明意識到青霉素是殺滅細菌的有效方法。 - Why are so many people more readily appalled by an unnatural form of dying than by an unnatural form of living?
為什么如此眾多的人對非自然形式的死亡感到震驚而對非自然形式的生存漠視呢？
