The diisobutyl dicarboxylate was prepared by using acid and isobutanol as material and acid as catalyst.以二羧酸和异丁醇为原料,用硫酸作催化剂,合成二羧酸二异丁酯.Conducting polyaniline ( PANI ) and poly - O - methylaniline ( POT ) were prepared by ...
Good luck is when an opportunity comes along and you're prepared for it. 好运就是当机会来临时，你早已做好了准备。Many students are not adequately prepared for higher education.许多学生并未做好接受高等教育的充分准备。A minority of officers were prepared to...
He heard the sharp crack of a twig.他听到树枝清脆的断裂声。He shifted his weight and a twig snapped.他挪了一下身体的重心，一根树枝咔嚓一声断了。The other end of the twig is sharpened into a sharp point to use as a toothpick.细枝的另一端被削尖用作牙签。Current twig and...
Friendship means understanding, not agreement. It means forgiveness, not forgetting.It means the memories last, even if contact is lost.友情是理解，不是妥协；是原谅，不是遗忘。即使不联系，感情依然在。We had this understanding that courses were roughly ...