n.标识,标记,记号笔,阅卷人,防守队员,特征
He put a marker in his book and followed her out.
他在书里夹了一个书签后便随她出去了。
He placed a marker where the ball had landed.
他在球落地的地方放了个标记。
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。