anti-roll bar
noun /ˌænti ˈrəʊl bɑː(r)/
  /ˌænti ˈrəʊl bɑːr/,  /ˌæntaɪ ˈrəʊl bɑːr/
 - a metal bar that is part of a car’s suspension, which stops the car from leaning too much when it goes around corners(汽车悬架的)横向平衡杆,防倾斜杆