“不发育”的英语？

“不发育”的拼音为：bù fā yù...

当反射和绕射相当不发育时,这些波看上去很清楚.The waves are sometimes seen clearly when reflections and discrimination are rather poorly developed.艾滋病病毒在蚊子体内既不发育也不会复制,蚊子嘴上残留的血液量微乎其微,远不足以引起传染.The trace amount of the virus on the mosquito is not...