We've been on a bit of a downer since the Liverpool game.自从利物浦比赛以来，我们一直有点沮丧。For divorced people, Christmas can be a downer.对离异的人来说，圣诞节令人感伤。Not getting the promotion was a real downer.未得到提升真让人很沮丧。...
The method is presented for preparation metasilicate pentahydrate from residue after extracting magnesium from serpentine ore.以蛇纹石提镁残渣为原料,采用常压蒸馏法直接合成了六配位有机硅化物.Gold ore main type is auriferous quartz vein type.金矿床主要为含金硫化物...
A porcupine is covered with prickles.箭猪身上长满了刺.A little porcupine made a house by the side of the river.小刺猬在小河边上造了一幢小房子.One of the sharp hollow spines of a porcupine or hedgehog.豪猪或刺猬身上硬而中空的保护刺....