科学家仍在研究这种化合物如何阻止病原菌侵染细胞.Scientists are still studying how the compound prevents pathogens from infecting cells.人们用光学显微镜,在受侵染的寄主中观察到这些微生物.Many of these microbes were observed in the infected host by light - microscope.伤口露...
Our newspaper is printing the full text of the President's speech.我们的报纸刊登了总统讲话的全文。Printing was first invented by Chinese.印刷术最早是由中国人发明的。...the invention of the printing press in the fifteenth century.15 世纪印刷机的发明Pebbl...
It is a good idea to place your order well in advance.早早就提前下单是个好主意。Clients normally pay fees in advance, monthly, quarterly, or yearly.客户通常按月、季度或年度预付费用。I had asked everyone to submit questions in advance of the meeting.我...