straight edge
noun [ C ] uk/ˌstreɪt ˈedʒ/ us/ˌstreɪt ˈedʒ/
直尺;直规;直缘
an object such as a ruler or a piece of wood, used for drawing or checking straight lines
Use a straight edge for cutting the fabric. 裁剪布料时要用直尺。
straight edge
adjective (also straight-edge) uk/ˈstreɪt ˌedʒ/ us/ˈstreɪt ˌedʒ/ (also straight-edged)
直边的
having an edge that is straight rather than curved or irregular
Use a straight-edge knife. 需要用直刃刀。
（生活方式）健康的
having a way of life that does not involve doing anything considered to be unhealthy or immoral
He's very straight edge now - no drinking, no smoking. 他现在生活很健康——不喝酒，不抽烟。