Diagrams and graphs are indispensable visual aids in many aspects of economics.图形和图解在经济学的许多方面是重要的形象工具.Therefore, it is frequently necessary to control certain aspects of the environment in such large enclosures.因此常常需要控制如...
Pickled cucumbers, jam, pickled berries, tomatoes; you name it, they've got it.酸黄瓜、果酱、腌浆果、西红柿，凡是你说得出的，他们都有。Birds feed on nuts and berries in the winter.鸟类靠坚果和浆果过冬。We went here and there looking for berries.我们四处寻找浆果....
A method of synthesis of butyl isobutyrate catalyzed by amidosulphonic acid has been studied.以氨磺酸为催化剂催化合成了异丁酸丁酯,确定了酯化优化条件.The method about synthesis of approximate straight line motion mechanism based on moving centrode ...
欢迎来到北京生物地磁学实验室!Welcome to the Bio - geomagnetism Group of the PGL in Beijing!国际地磁参考场 ) 资料在地磁学的基础研究中得到广泛的应用.The data of IGRF ( International Geomagnetic Reference Field ) are widely used in geomagnetic basic investigation...