星期六晚上停止营业后他神秘地失踪了.He vanished mysteriously after the close of business on Saturday night.他突然间神秘地出现了;我既没看见他来,也没听见他的脚步声。He had materialized out of thin air; I had not seen or heard him coming.老汉神秘地一笑,指着正北的方向说: “ 喏,从那里, 北京....
Yeast is a single - celled organism complex to study for initial screening purposes.选择酵母是因为酵母是单细胞生物,便于研究.Fully understanding its harmfulness, one adopt preventive measurment to prevent organism invasion.充分了解其危害, 采取防范措施,防...