魏碑心思朗文词典

plumb-line

P 开头单词

柯林斯词典

    plumb line (plumb lines)

  • 1. N-COUNT A plumb line is a piece of string with a weight attached to the end that is used to check that something such as a wall is vertical or that it slopes at the correct angle. 鉛垂線

    • 返回 plumb-line