线

• The extremities of a surface are lines .
  面的边缘是线。
• We have marked the playing area off with a white line .
  我们已用白线画出运动场地。
• The traverse performs very well .
  这种排线器工作很好。
• Alphabets without serifs are called sansserif .
  不带这种衬线的字母称作无衬线字母。
• These were suporseded by hachures .
  这些被晕翁线取代。
• the two lines are united at an angle of 45°.
  两线以45度角结合。
• The ventral nerve cord is covered externally by a peritoneum .
  腹神经线外被以腹膜。
• The threads are wound into a ball .
  线已经绕成球了。