biting point       
noun [ C usually singular ] UK uk/ˈbaɪ.tɪŋ ˌpɔɪnt/ us/ˈbaɪ.t̬ɪŋ ˌpɔɪnt/ (also bite point, /ˈbaɪt ˌpɔɪnt/ /ˈbaɪt ˌpɔɪnt/)
 (车辆)离合片咬合点
the point when a vehicle's clutch (= the part that allows the engine to turn the wheels) becomes engaged (= connected) and the vehicle can start to move
  In a hill start, it is quite hard to catch the clutch at its biting point and pull away without using the handbrake. 坡道起步时,如果不拉手刹,要在咬合点抓紧离合器让车起步是相当困难的。 
 The clutch pedal has a particularly high bite point. 离合器踏板的咬合点特别高。 
 - More examples
 - When it gets to the biting point, you'll notice the revs climb to 1400 rpm to correct the stalling.
 - The trick is to find the clutch biting point and keep it there while gently increasing the revs.
 - The engine needs quite a lot of power as you bring the clutch up from biting point.
 - As Tom had instructed me, I eased my clutch foot up to find the "bite point".