marker造句

Draw your child's outline with a heavy black marker.
用浓黑色的毡笔画出你孩子的轮廓。

He placed a marker where the ball had landed.
他在球落地的地方放了个标记。

Step off twenty feet and then place a marker in the ground.
先步测20英尺,再在地上做出标记.

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