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- Positive vorticity zone 正涡度区
- It indicates that the positive vorticity and wind vector cyclonic shear are obviously on the lef t sid e of LLJ. 结果表明，大风冰雹出现在急流轴左侧具有较强正涡度及风场气旋式切变的区域内；
- Positive vorticity region was consistent with the precip itation area, whose centerwas a sign of the heavy rain center. 正涡度区域与降水范围一致,其中心对暴雨中心落区具有指示意义;
- The precipitation area has a good relationships with low level positive vorticity, water vapor, pressure energy,moist enthalpy,potential vorticity etc. 诊断分析中发现暴雨落区和低层正涡度、水汽、压能、湿焓、位涡等有很好的对应关系。
- The torrential rain region located in the strong gradient region western to positive vorticity and below of the center of vertical ascent motion. 暴雨区位于正涡度中心西侧的强梯度区和上升运动中心的下方；
- A couple of positive vorticity centers and a couple of convergence centers appear in the mesoscale cyclone,and their locations are consistent withthe observation. 中尺度气旋内存在明显的与雨区位置相对应的双涡度中心与双辐合中心，其位置与观测资料的诊断分析结果较一致。
- The intensification of the positive vorticity and divergence at the low levels induced the formation of the meso-scale vortex and the center of torrential rainfall. 低层正涡度和辐合作用的加强，导致中尺度低涡的形成和暴雨中心的产生。
- The result shows while the solar radiation gradually enhanced in the daytime, the positive vorticity of lower level atmosphere and negative vorticity of high level atmosphere over the TP is increase. 而低层则是加热制造正位涡，并使周边地区向高原的辐合增强，摩擦耗散是低层抑制正位涡增长的主要因素。
- The merging of the cyclonic vortex with vorticity lumps in the shearing basic flow of positive vorticity is directly responsible for the maintenance and development of the cyclonic vortex. 正相对涡度切变基流中低涡和涡块的合并,是东移低涡强度得以维持和发展的一个直接的原因。
- The results show that convective precipitation happens easily when positive vorticity appears on the middle-low-level of troposphere and negative vorticity appears on the high level. 结果表明 ,当对流层中低层为正涡度 ,高层为负涡度 ,在垂直方向有较大上升运动时 ,则易导致对流性降水 ;
- There is positive proof that he did it. 有确切的证据证明他做了此事。
- The Norwegians live in a comparatively cold zone. 挪威人生活在比较寒冷的地区。
- Supplies were parachuted into the earthquake zone. 救援物资已空投到地震区。
- Some people live in Torrid Zone. 有些人生活在热带。
- Her behaviour was a positive outrage. 她的行为残暴到了极点。
- I'd like to see Europe as a nuclear-free zone. 我希望欧洲成为无核区。
- The troops detrained near the battle zone. 部队在战区附近下了火车。
- I'm positive she told us to meet at noon. 我肯定她是告诉我们在中午见面。
- This charge is a positive charge. 这个电荷是正电荷。
- She shows a very positive attitude to her work. 她工作态度非常积极。
