单词	unvented
释义	unvented /ʌnˈvɛntɪd / adjective Without a vent or outlet: an unvented hot water cylinder... If central furnace/room heaters with flues are taken as the reference group, the relative risk for wall/floor heaters, both unvented and vented, is 13. Space heaters are also classified as vented and unvented. The participants included 20 453 people born into homes with unvented coal stoves; 16 606 subsequently changed to stoves with chimneys.
随便看	von Sternberg, Josef von Willebrand's disease voodoo voodoo economics voodooism voodooist Voortrekker VOR -vora voracious voraciously voraciousness voracity Vorarlberg -vore Voronezh Voroshilovgrad -vorous Vorstellung vortal vortex vortical vortically vorticella Vorticism

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