名词
中文翻译：指示杆
同义词：
['indicate', 'indicator', 'pointer', 'rod']
例句：
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1.The teacher used the pointer to point out important information on the board.
老师用指针在黑板上指出重要信息。
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2. The doctor uses a rod to help him operate on his patient.
医生用一根棒子帮助他为病人做手术。
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3. The scientist used a rod to measure the length of the object.
科学家用一根棒子测量物体的长度。