And later on if you right before or right during you give the dog some food you--you ping a bell the bell will cause the saliva to come forth.

,在喂食前或者喂食过程中,你摇铃,铃声就会加速唾液的分泌。

耶鲁公开课 - 心理学导论课程节选

Ping pong back and forth faster.

FORBES: Connect

This will result in "parliamentary ping-pong", meaning the Growth and Infrastructure Bill goes back and forth between the two Houses until a resolution is reached.

BBC: Peers reject workplace rights-for-shares scheme

Where differences of opinion between the two chambers prove difficult to reconcile, a bout of parliamentary ping-pong may ensue - so called because a bill bounces back and forth between the Commons and the Lords until both chambers approve the final wording.

BBC: Democracy Live site links