1. plumb line是什么意思

1. 铅垂线：查尔斯达尔文(Charles Darwin )是证明有根植物都带有重力探测器第一位西方科学家:称为铅垂线(plumb line)[1]的重力方向线,它能有效地使植物产生向上或向下的感觉.

2. plumb line的反义词

2. 铅锤线：plum 李子 | plumb line 铅锤线 | plumb rule 垂规

3. plumb line在线翻译

3. 铅垂;垂直线：plumb bob 锤球;测锤 | plumb line 铅垂;垂直线 | plumbing 水管装置

4. 铅垂线,重垂线：plumb level 水准仪,水平仪 | plumb line 铅垂线,重垂线 | plumb line deviation 垂线偏差

1. （检查垂直度的）铅垂线
    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.

1. a cord from which a metal weight is suspended pointing directly to the earth''s center of gravity
    used to determine the vertical from a given point

    Synonym: perpendicular