"以线条标示" can be translated as "mark with lines" or "indicate with lines" in English, depending on the specific context and intended meaning.
"Mark with lines" emphasizes the action of using lines to make a mark or notation.
"Indicate with lines" focuses more on using lines to show or point out something.
Both expressions are commonly used in various fields such as design, engineering, and cartography to describe the act of using lines for visual representation or clarification.