... a given substituent is electron-withdrawing or electron-donating relative to hydrogen, but they also give us a qualitative and quantitative sequence of EWG-power or EDG-power. Please note, as we will see, that a para X has a different sigma value that of a meta X.我的疑问:but they a...
韦氏词典:The work won't be finished for another three months
at best.这项工作最快也要再干三个月才能完成。牛津:We can't arrive before Friday at best.我们无论如何星期五之前也到不了。第一句话能否翻译成:这项工作再有三个月也完成不了?...
...you are addressing an obligation
or expectation that is worthwhile for you to do right now? Or is this some old
mental model you have in your head about you, who you
"should" be and what you "should" be doing, that maybe isn't worth
clinging to?判断一下你真正想表达的意思。你是否真...