Warning: file_put_contents(/www/wwwroot/ppbbu/28094.com/cache/4da3bf3fec84f17b69f15889af900636.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/28094.com/index.php on line 55 retort stand例句_retort stand英汉例句_retort stand双解例句_贰靶汉英词典
It is constructed out of metal plates and rods, arranged helically around a retort stand, and shows one complete turn of the famous double helix. 它由一些金属板和金属棒构架而成，螺旋形的围裹在一个蒸馏架上，展示了那个知名的完整双螺旋旋转。每个金属片代表四个碱基之一。