VERBS | ADVERB | PREPOSITIONVERBS➤be, seem易變;似乎易變▸➤become變得反複不定ADVERB➤extremely, fairly, very, etc.極其/相當/非常多變▸➤highly, widely變化無常◇Polar habitats are harsh and highly variable.極地的生存環境條件艱苦,變化無常。➤infinitely變化無窮◇These systems are infinitely variable.這些系統變化無窮。PREPOSITION➤in在⋯方面多變◇variable in shape形狀上富於變化