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...
I don't class myself as being very intelligent or brainy.我并不认为自己是那种非常聪明、脑子好使的人。Being a Communist was a badge of honour for thousands of trade union activists.对数千工会积极分子来说，成为共产党员是荣誉的象征。Being dyslexic does not mean tha...
The Doberman let out a string of roaring barks.短毛猎犬一阵狂吠。Laura let out the clutch and pulled slowly away down the drive.劳拉松开离合器踏板，沿车道慢慢驶离。Something brushed past Bob's face and he let out a yell.有什么东西从鲍勃的脸上扫过，他大叫了一声。...
Occasionally he was even rather absentminded and faraway when the bride leaned forward and addressed him.偶尔,当新娘探身对他说话时,他甚至有点心不在焉和精神恍惚.Between the talk, we have kind of absentminded feeling.谈话间, 我们都有种恍惚之感.Michael looked a...
有人把一大块石头给凿空了。Someone had hollowed out a large block of stone.司马迁把这一历史性的壮举形象地描绘为“凿空”.Sima Qian visualized this feat as blazing the path into the west regions....