increasing serious problem,air

increasing serious problem,air increasing increasing the increasing population has become one of the most serious challenges in the world 中为什...the increasing population has become one of the most serious challenges in the world 中为什么要用increase 的ing形式加了ing就是形容词了 定语从句Which指代句子中的哪一个先行词?Even so ,allowing women to join the military carries certain risks,the most serious of which is the possibility of increasing the already high crime rate in some armies. am serious. 请问serious nothing serious serious illnesses serious是什么意思 serious 是什么意思 请问“serious serious是什么意思 serious是什么意思 at an increasing rate ever increasing speed ever ever-increasing是什么意思? ever-increasing是什么意思?