单词	posigrade
释义	posigrade adjective posi·​grade ˈpäzəˌgrād : relating to, using, or being an auxiliary rocket that imparts additional thrust to a spacecraft in the direction of motion Word History Etymology positive + -grade (as in retrograde) First Known Use 1961, in the meaning defined above
随便看	hospitallers hospitalman hospitalmen hospitals hospitia hospitious hospitium hospitiums hospodar hospodars hoss hosses host host cell host cells host plant hosta hostaceaes hostae hostage hostage crisis hostaged hostages hostageship hostaging

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