灯泡里的10个二极管，每个都涂上磷，放置在环形的铝制插槽中。
The bulb's 10 diodes, each with a yellow phosphor, sit along a halo of aluminum fingers.
极环星系是种稀有的星系类型，它们有着几乎和银盘平面垂直，呈环形公转的大量的恒星、气体和星尘。
A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk.
LCROSS探测器，对月球环形山观测和传感卫星，上周推出，也有任务目标，以确认在接近月球极阴影中的环形山的存在或缺乏的水冰。
LCROSS, the lunar crater Observation and Sensor Satellite, launched last week, has a mission objective to confirm the presence or absence of water ice in a Shadowed crater near a lunar pole.
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