| 释义 | ●ˌjam sth ˈonif you  jam on the brakes  of a vehicle, you operate them suddenly and with force 猛踩(剎车)◆A child ran into the road and I jammed on the brakes. 有个小孩跑到马路上,我急忙踩剎车。OBJ
  onlythe brakes, the handbrake SYN slam sth on[v + adv + n] [v + n/pron + adv]
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