您要查找的是不是:
- PSA灰区grey zone
- 区district
- 灰区gray area
- 诊断灰区Diagnoses Gray Zone
- 灰区措施grey area measure
- 太阳黑子周围较浓的浅灰区The grayish outer part of a sunspot.
- 区号district number
- 厂区factory; mill; plant; works
- 大区pergana
- 不费吹灰之力as easy as blowing off dust - not needing the slightest effort
- 明区hyalomere
- 吹灰之力just little effort
- 吹灰器sootblower
- 保存工作区save workspace
- 清灰soot cleaning
- 中区median space
- 灰黑greyish black
- 扇区sectors
- 泥灰岩marlite
- 病区infected patch