gyratory
gyratory[dʒʌɪˈreɪt(ə)ri, ˈdʒʌɪrət-]adjective- of or involving circular or spiral motion
旋转的,回旋的,环动的
(pl. -ies)- a road junction or traffic system requiring the circular movement of traffic, larger or more complex than an ordinary roundabout
环形路口
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