unblock [ˌʌnˈblɑ:k]

例句:

• Dorsey identifies societal roadblocks and endeavors to unblock them.
  来自WSJ
• Father told me to unblock the pipe to let the water run through.
  父亲叫我把管子打通,让水流过去.
  
• We had to call a plumber to unblock the drains.
  我们得叫管工来通一通下水道.
  
• Unblock the pipe and run the dirty water through.
  把堵赛的管子通一通,让脏水流过去.
  
• He identifies big societal roadblocks and endeavors to unblock them.
  来自WSJ
• It is not money they need in terms of safety, it is a willingness to unblock the blockages and get things moving properly.
  来自THETIMES