sentinel hole

 
  • 监察孔

sentinel hole的用法和样例:

例句

  1. His strength in a crisis is an ace in the hole.
    临危不惧是他的看家本领。
  2. The press is a sentinel of our liberty.
    新闻界是捍卫我们自由的卫兵。
  3. He chiseled a hole in the door to fit a new lock.
    他在门上凿了个孔,以便装一把新锁。
  4. The bird picked a hole in the ice with its beak.
    那鸟在冰上啄出了一个洞。
  5. The child has picked a hole in his new jumper.
    孩子的新毛衣上勾了一个洞。
  6. Stick your hand in and see what's in the hole.
    把手伸进去,看看洞里有什么。

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