名词
中文翻译：计数框架
同义词：
['counter', 'counterpart', 'frame', 'counting device']
例句：
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1. The engineerused a counting-frame to count the grains of sand.
工程师使用计数器来数沙粒。
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2.The scientist developed a new counting-frame that could accurately measure DNA.
科学家开发了一种新计数器，可以准确测量DNA。
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3. The engineer used a counting-frame to count the grains of sand in the riverbed.
工程师使用计数器在河床上数沙子的颗粒。