a pinpoint of light
collocation一丁点亮光
He could see a pinpoint of light in the distance.
他看到远处有一点亮光。
针尖
先理解核心含义，再看它在真实句子里的用法。
针尖
the point of a pin
The detective was able to pinpoint the exact location of the missing painting.
侦探能够精确找到失踪画作的位置。
针尖
The point of a pin.
极小的东西；微小的点
Something infinitesimal; a tiny point.
Under the microscope, the grain of sand appeared as a tiny pinpoint of light.
在显微镜下，沙粒呈现为一个微小的光点。
The map indicated our destination with a red pinpoint.
地图上用一个红色针尖标记出我们的目的地。
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一丁点亮光
He could see a pinpoint of light in the distance.
他看到远处有一点亮光。
针尖
The pinpoint of a needle is very sharp.
针尖非常锋利。
一点灰尘
A pinpoint of dust landed on the lens.
一点灰尘落在了镜头上。
极小的一片土地
The island was just a pinpoint of land in the ocean.
那座岛只是海洋中的一小片土地。
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把'pinpoint'拆成'pin'(针)和'point'(点)，联想用针尖点出精确位置。
语域：neutral 常见场景：精确定位、科技、日常描述 作为名词时，'pinpoint' 通常用于正式或技术性语境，如精确定位和科技领域，但也可在日常生活泛指极小之物，故 register 设为中性。
可数名词
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.