The bipolar star-forming region spotted by Hubble is actually two giant, super-hot streams of gas blasting outwards from a central star.
哈勃这次发现的这片产星区有两极，是由一颗中央星向外延展所形成的超高温气流。
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The bipolar transistors or the resistors in the traditional current reference were replaced by MOS transistors working in the subthreshold region to achieve an all CMOS current reference.
An active region with a bipolar sunspot is formed when the magnetic flux ring of the sunspot rise to the solar surface from the depth of solar convection zone.