很多环戊烷的衍生物在这个范围也出现吸收.Many cyclopentane derivatives also absorb in this region.后者是由二氧杂环戊烷中活化较弱的C -H 键离解而产生的.The latter arises from abstraction of the somewhat lesser activated C - H bond in the dioxolane.控制缩合反应的温度,还得到一种苯并环...
I went to college anyway, as a part-time student, paying my own way.总之我上了大学，半工半读，自食其力。It was a long haul doing the degree part - time, but it was worth it.在职攻读学位的过程虽然费时很长且很辛苦, 但是非常值得.Do you plan to find a part time job i...