Mosquito Coil stand, control burning time by numbers, and also a time clock tool.
蚊香的支架，用数字来帮助掌握燃烧的时间，又可当作计时的工具。
Clock drawing test is used widely to study and test the cognitive deficits and the cognitive decline in old population and proved to be a useful screening tool for dementia patient.
钟面画测试被广泛用于研究和测试老年人群中的各种认知缺陷和认知老化，是一种有用的筛选老年痴呆症病人的工具。
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