问题描述: we have as yet found no obstacle yet 1个回答 分类:综合 2014-09-23 问题解答: 我来补答 we have as yet found no obstacle我们尚未发现任何障碍as yet至今仍; 到目前为止,迄今为止,到这时为止(还没有,还不是);到当时为止;至今还未 展开全文阅读