mark with a circle

常见例句

Arrays are denoted with brackets ([]); simple scalars are marked with a blue circle.
数组标有方括号（[]）；简单的标量标有蓝色圆点。

Below that is a row of four test tubes, marked with a circle, an X, a square and a plus sign.
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The best deals show up as a big green circle, while overpriced seats are marked with a smaller red dot.
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And remember that the trains marked with the number 7 within a diamond are the skip-stop express trains and the circle 7s are the locals.
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