big dip·per
noun/ˌbɪɡ ˈdɪpə(r)/
/ˌbɪɡ ˈdɪpər/
- (old-fashioned, British English) a small train at an amusement park, which goes very quickly up and down a steep track and around bends
（游乐场的）云霄飞车，过山车 - the Big Dipper(North American English)(British English the Plough)[singular] a group of seven bright stars that can only be seen from the northern half of the world
北斗七星；大熊星座