Substances conveying plant resistance to insects include inorganics, primary and intermediary metabolites and secondary substances.给予植物抗虫性的物质包括无机物, 初始、中间代谢物和次生物质.Now, a living language has been found that can play the sa...
The planetarium staff also prepared talks for radio broadcast.天文馆的工作人员还要准备讲稿给电台广播.On his days off, he takes them to the Museum of Natural History or the Planetarium.休假的日子里，他就带他们去自然历史博物馆或是天文馆。The motions of the stars can ...