TopHat was a scientific experiment launched from McMurdo Station in January 2001 to measure the cosmic microwave background radiation produced 300,000 years after the Big Bang. The balloon was launched on January 2, 2001 and proceeded to fly for 644 hours over the continent of Antarctica before landing on January 31, 2001.
权威例句
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There are 51 "action points" including buttons, tophats, rockers, and even a sort of trackball for moving targeting reticules.
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