1. gull family; skimmer family; jaeger family; auk family. 
   海鸥科；剪嘴鸥科；贼鸥科；海雀科。
2. There is a ring of scum in the washbasin. 
   这个脸盆内有一圈污垢。
3. the scum formed by oxidation at the surface of molten metals. 
   熔铸的金属表面氧化产生的渣滓。
4. impermeable stone; an impermeable layer of scum; a coat impermeable to rain. 
   不透水的石头；防水的沉积层；防雨外套。
5. These scum who fight at football matches must is severely deal with. 
   这些在橄榄球赛上殴斗的社会渣滓必须严处。

查看更多例句 相关情景会话

• 1. 转动除沫器
  22 effluent流出...23 revolving scum skimmer转动除沫器...24 rigid flights刚性刮片
  www1.ye-ya-jian.com - 相关搜索