在这个形状不规则的湖泊的湖心以外的地方有一眼喷泉。Located off-center in the irregularly shaped lake was a fountain.某些湖泊的水位变动极大.The water level in some lakes may vary greatly.在海市蜃楼中,沙漠有时会现出湖泊的形象.In a mirage the desert will mimic a lake....
An unruly mob broke down police barricades and stormed the courtroom.一伙暴徒捣毁了警察设置的路障冲进法庭。Last year 600 inmates rioted, starting fires and building barricades.去年，600名犯人闹事，他们纵火并设置路障。Youths threw up barricades on the streets...
目的: 从佩兰中提取挥发油,并测定其含量.Objective : To extract and determine naphtha in Eupatorium fortune.方法: 采取超临界CO2萃取 、 微波萃取和水蒸汽蒸馏三种方法提取佩兰挥发油.Method: The volatile oils were obtained with supercritical CO 2, microwave and stream distill...