雅马哈天隼125评测:this isn't rocket science 什么意思呢？？

this isn't rocket science 什么意思呢？？ this site is stupid,isn't it? Shall I with this what the group isn't what they do?什么意思 actually this pen isn't mine.but i will use it. 这句话正确么 This is _____great weather ,isn't it? 填 the 还是 不填 好？ hydrovideo? but this blouse isn't particularly flattering actually,and I don't have nothing else!@ Why isn't you ? 翻译此句子:he thought,"this place isn't far. I can find it easily." --Jack,Tom isn't here. I isn't in your homelangde