免费成人A片免费看|亚洲有码视频在线观看|美女毛片视频激情超碰|91精品国产欧美一区二区成人|久久无码精品一级A片一高潮不断|亚洲性爰专区三级片不卡免费|欧洲另类AV无码国产免费看|免费观看黄片视频|三级黄色网片在线|国产精品一区二区三区网址

單詞乎

plumb-line

plumb-line是什么意思、plumb-line怎么讀

plumb-line漢語翻譯

vt. 用鉛錘線測(cè)量, 檢查, 探測(cè)

plumb-line英語解釋

名詞 plumb-line:

  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
    同義詞：plumb line, perpendicular
0
糾錯(cuò)