in the mid-1990s 和 by the mid-1990s有什么区别?

in the mid-1990s 和 by the mid-1990s有什么区别? in the mid 1810's怎么翻译 in the mid-60s什么意思 英语翻译RT还有：popular since the mid 70sintroduces in the mid 80s in the mid-dell ■4-year Bachelor's degree with a standing in the mid B range ,大概平均GPA要多少? She's in her mid in his mid-20's 英语高手请进：In the mid 1970s,那个S的意思? Highs in the mid 50s and lows in the upper 30s.这句话怎么翻译 in one s mid thiries 翻译 pls help to translate below sentencebefore the compound went generic in the mid-1990s.pls explain what the mean of went generictks alot The study,published,compared serveys between the early 1990s and the mid-2000s. ”highs should be in the mid-80s to low 90“的意思 英语翻译Development began in the mid-1970s and continues actively as of 2012. 请问这里的mid-nineties是什么意思?来自一则天气预报:Today's high will be in the mid-nineties——the eighth straight day of plus-ninety temperatures. 英语翻译这个 the mid-1895s翻译 keep the big picture in mid是什么