关于英语的问题It is pretty well understood.请问这个句子中Pretty 和well的词性

名词性从句一道选择题It is pretty well understood that control the flow It is pretty well understood ___controls the flow of carbon pretty well和pretty good的区别 pretty well 和 pretty good 的区别 这个题目怎么理解It is pretty well understood ____ controls the flow 英语,名词性从句 It is pretty well understood______controls the flow 翻译 It is not yet pretty well understood what made the rainfo it is pretty well understood what controls the flow of carbo It is pretty well understood today ___ causes the change of 英语翻译It is pretty well understood what controls the flow of c 单句改错：it is pretty well understood how control the flow of ca Now she plays it pretty well和The game was pretty good中为什么一个用