Zonelli佐内利zonen.地域；地带；地区zone of acceptability可接受区zones of hyperalgesia[医] 痛觉过敏带, 海德氏带zone of rock fracture岩石裂隙带zone of semi-coking半焦化层zone of littoral drift海岸漂流带zone of antigen excess抗原过剩带zone of silence marker"静"区指点标zone of mild pollution中等污染带Zone Operation Control区域操作控制zone of small pyramids[医] 小锥体细胞区

1. The focus on my camera isn't working properly.
   我的照相机上的调焦装置有毛病。
2. A good observer is always fiddling with the focus, trying to get it just a hair sharper.
   一个好的观测者总是乐于花时间在调焦上，尽量使星象变得最尖锐。