当太阳内部深处形成巨大的磁力环，该处将会产生井喷并突破太阳表面，从而使表面的局部地区温度下降，看上去就像一个暗斑，这就是黑子的形成。
They form where giant loops of magnetism, generated deep inside the sun, well up and burst through the surface, leading to a localised drop in temperature which we see as a dark patch.
实验室研究表明它的性能符合化学治疗控制菌斑的原则，适合于牙周局部途径给药。
Labaratory research indicated that its features conformed to the criteria of chemotherapy controlling plaque, suitable for local drug delivery.
结果在速度剪切度增大到一定程度时，将会出现小尺度扰动的混沌行为，它导致局部高剪切区中湍斑的产生。
Results as the velocity shear increases to a certain extent, the small scale disturbances will exhibit chaotic behavior, which leads to the production of turbulent spots in local high shear regions.
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