The snow, except where it drifted, was only calf-deep.除了吹得堆积起来的地方，雪只有小腿肚深。A pall of oily black smoke drifted over the cliff-top.一团油腻的黑色烟雾飘到悬崖顶上。A smell of bread drifted from some distant bakery.一阵面包的香味从远处的面包房飘来。...
OBJECTIVE To optimize conditions for extracting flavonoid compounds from Sophora alopecuroides L.目的优化苦豆子中黄酮的最佳提取工艺.The method is presented for preparation metasilicate pentahydrate from residue after extracting magnesium...