如:one grade in the 30s上下文:which indicates that the

发布时间：2021-02-22 00:45:08

如:one grade in the 30s上下文:which indicates that there were no grades below 30,one grade in the 30s,one in the 40s,none in the 50s,two in the 60s,three in the 70s,two in the 80s,four in the 90s,and one

网友回答

没见过这样的句式.30s一般是年代或者岁,这里应该是年代,上世纪30年代
======以下答案可供参考======
供参考答案1:
30秒吗？？
你至少把上下文贴出来啊
供参考答案2:
年代--30年代
以上问题属网友观点，不代表本站立场，仅供参考！