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...
The assessment approaches of teaching portfolios are conference, interview, presentations, written evaluation, rubrics and so on.教学档案袋的评价方法有召开讨论会 、 面谈法 、 叙述法 、 书面评价 、 出题目等.Quick powering on and off, an advantage for smoo...
I orchestrated the Song of the Volga Boatmen.我把《伏尔加河船夫曲》改编成了管弦乐曲.The boatmen accompany the stroke of their oars with the sound of their voices.船夫们一边划桨一边喊号子。The boatmen were still arranging the luggage.船夫们还在安放行李....
...nerve nodes.神经结The problem appears to be caused by a logjam of nerve messages.据《每日邮报》1月28日报道,常言道“一心不能二用”,而引起这一问题的关键可能是神经讯息在传递过程中受到了阻碍.The sympathetic nerve distributing cerebral vessels originates from the cervical sy...
Volunteers constitute more than 95% of The Center's work force.该中心95%以上的工作人员是志愿者.The work force has been laid off.工人们被辞退了.In the last ten years automation has reduced the work force here by half.在过去的10年中，自动化已经减少了这里一...