dross
n. 浮渣；糟粕；无价值之物
形容词：drossy
近义词：rubbish，trash，garbage，scum，waste，junk，impurity，slag，scoria，
英英释义
Noun
- worthless or dangerous material that should be removed;
"there were impurities in the water"
- the scum formed by oxidation at the surface of molten metals
例句
用作名词(n.)
- They tried to purge metal of dross.他们试图清除金属熔化时浮升表面的渣滓。
- For foreign cultures, we should discard their dross and select their essence.对于外来文化，我们要取其精华，去其糟粕。
- The best players have gone off to the big clubs, leaving them the dross.最好的队员都投奔大俱乐部去了，留给他们这些不怎么样的球员。
- What's gold and silver? Mere dross.金银财宝，身外之物。