他笑容忧郁地凝视着我，闪亮的眼睛里空无一物。He fixed me with those luminous, empty eyes and his melancholy smile.他们碰见她独自一人神色忧郁地走在海滩上。They found her walking alone and depressed on the beach.将军神情忧郁地望着队列经过。The general watched the process with an...
钡以重晶石形态 ( 硫酸钡 ) 在工业上用作油漆的白色涂料.Barium as barite ( barium sulfate ) is used industrially as a white pigment for paint.红碧玉、重晶石等具有喷流岩的特征.Red carneol and barite etc. have the features of plume rocks.实际的重晶石用量取决于井下的实际需要.Actual ...