knock-wave

基本解释

• 冲击波

同根派生

英汉例句

• Keep your hands off me; or I'll knock you down.
  不要碰我，当心我把你打倒在地。
• There was a furious knock at the door.
  有人在猛烈地敲门。
• Bill wave his hand to us and then drive away.
  比尔向我们挥手告别后开车走了。
• Radio2 can be heard on the long wave band.
  第二广播电台可在长波段收听到。
• Mind you don't knock your head (on this low beam).
  小心，别(让这根低梁)撞著头。