不打无把握之仗.Fight no battle you are not sure of winning.不打无准备之仗, 不打无把握之仗.Fight no battle unprepared; fight no battle you are not sure of winning.事实上, 这个方法是很费事 、 很困难而且是无把握的.In practice, the method is tedious, difficult, and u...
在需氧体系中, 氧是末端电子接受体并且被还原.In aerobic systems, oxygen is the terminal electron acceptor and is reduced.许多天然纤维在需氧菌的侵袭下则迅速腐坏.Many natural fibers decay rapidly when exposed to aerobic cultures.幽门杆菌是一只革兰氏阴性螺旋菌, 生活在微需氧的环境下.Helico...