单词	extravehicular
释义	extravehicular /ˌɛkstrəvɪˈhɪkjʊlə / adjective Relating to work performed in space outside a spacecraft: extravehicular activity... Besides logging more than 259 hours in space, he has more than 14 hours of extravehicular activity, or spacewalking. That's where astronauts practice extravehicular activities, more commonly known as spacewalks. Two projects focus on advanced technologies for extravehicular activity.
随便看	porcellainous porcellaneous porcellanic porcellanised porcellanite porcellanitic porcellanized porcellanous porch porch chair porch climber porch-climbing porched porchetta porchless porchmouth porch swing porchway porcine porcini porcinity porcupinal porcupine porcupine crab porcupine disease

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