有几个句子看不懂,请大家帮忙下哈 1. Scientists have yet to formulate a definitive explanation for Henyey's findings. have yet to 表示还没有呢还是表示有呢? 2. Until recently, zoologists believed that all species of phocids (true seals), a pinniped family, use a different maternal strategy than do otariids(fur seals and sea lions),another pinniped family. Until recently, zoologists believed 应该翻译成直到现在,动物学家还相信还是直到现在,动物学家才不相信呢? 3.It is perhaps surprising to argue that an employed population could be enticed to move, but an explanation lies in the labor conditions then prevalent in the South. argue that 是表示同意that后的内容还是不同意that 后的内容呢?    |