单词	环形隧道--环状隧道
释义	环状隧道；环形隧道loop tunnel
随便看	the fourth estate the fourth generation of r&d management the fourth of july the fourth or lowest clepsydra the fourth (or ring) finger the fourth sound the fourth uncle the fourth wrangler of the hanlin the four wind s the fox the fox borrows the tiger's terror, follows close behind the tiger the fragrant harem the fragrant name the fragrant regions of paradise the frame for a building the frame for a door the frame for a roof the frame of the mind the frame or skeleton of man the frederick philips award the freedom of a city the freemasons' lodge the freezing hell the french the fresh color of a gem