克莱尔和戴维·阿斯特正在画远处西班牙山峦的风景素描。Clare and David Astor are sketching a view of far Spanish hills.展览会上最贵重的展品是毕加索的一幅素描。The most valuable item on show will be a Picasso drawing.他先是画素描，然后发展到画油画。He started with sketching and then pr...
如果你读过我早期的回忆录，就全都明白了。If you've read my earlier memoirs you'll know all about it.老沃尔特正在写他乡村生活的回忆录。Old Walter is setting down his memories of village life.无数次劝他写回忆录的尝试均以失败告终。Numerous attempts to persuade him to wr...
The content of ginsenoside in Panax quinquefolium L was determined by colorimetry.用香草醛-冰醋酸比色法测定西洋参中总皂甙的含量.By colorimetry, the adsorptive capacity and service life of D - 101 macroreticular resin for ginsenoside were stud...