marker是不是long a...

marker是不是long a

marker
英 [?mɑ:k?(r)] 美 [?mɑ:rk?(r)]n.标识，标记； 记号笔，阅卷人； 防守队员； 特征复数： markers
双语例句
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。2. 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。
3. He placed a marker where the ball had landed.他在球落地的地方放了个标记。
4. 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.
5. Step out ten feet and then put a marker in the ground.步测十英尺,然后在地上做出标记.