It may someday be worthwhile to try to recover uranium from seawater,but at present this process is prohibitively expensive. Someday,it maybe worthwhile to try and recover uranium from seawater （My choice）
我觉得这两个选项没啥区别的，maybe 和 may be 有区别吗？哪个优选？
2.
During her lecture the speaker used map to clarify directional terms,for not everyone in attendance was knowledgeable that wind are designated by direction from which they come.
a. for not everyone in attendance was knowledgeable b. for everyone in attendance didn't know c. with everyone in attendance not knowing (My choice) d. with everyone attending not knowledgeable e. for not everyone attending knew
我无法理解这个插入语。。。
作者: sdcar2010 时间: 2010-12-1 07:12
"try and recover something" = if you try, you will recover something.
"for" = since, because. So it leads a clause, not a phrase.作者: ciciana 时间: 2010-12-2 07:16
THX！！！第一次发帖，就收到如此高效的回复，真高兴！~~~~BTW ，maybe 和 may be 有“区别”吗？作者: sdcar2010 时间: 2010-12-2 07:38
THX！！！第一次发帖，就收到如此高效的回复，真高兴！~~~~BTW ，maybe 和 may be 有“区别”吗？
-- by 会员 ciciana (2010/12/2 7:16:12)
有“区别. But in your case, it was merely a typo.作者: sheikh239 时间: 2010-12-2 12:24
may be带了个谓语 maybe没有谓语，还要自己加一个