单词	heavier-than-air
释义	heavier-than-air adjective heav·​i·​er-than-air ˈhe-vē-ər-ṯẖən-ˈer  : of greater weight than the air displaced Word History First Known Use 1903, in the meaning defined above
随便看	gainfulliest gainfully gainfully employed gainfulness gainfulnesses gaingiving gaingivings gaining gaining ground gaining machine gaining on gainings gainless gainlesslier gainlessliest gainlessness gainlier gainliest gainlinesses gainly gainor gains gains ground gains on gainsaid

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