a smirch in the time-frequency plot
smirch 在此为天文学术语，指在时频平面上呈现模糊外观的辐射信号，而非日常所说的“污点”。
The astronomers spotted a smirch in the time-frequency plot.
天文学家在时频图上发现了一处模糊的涂抹状信号。
天体辐射功率的短促信号,在时频平面图上呈现模糊外观(通常与围绕超大质量黑洞运行的巨大天体有关)；脏污；污点
A chirp in radiation power from an astronomical body that appears smeared on a time-frequency plot, often associated with a massive body orbiting a supermassive black hole.
天文术语
天体辐射功率的短促信号,在时频平面图上呈现模糊外观(通常与围绕超大质量黑洞运行的巨大天体有关)
A chirp of radiation power from an astronomical body that has a smeared appearance on its plot in the time-frequency plane (usually associated with massive bodies orbiting supermassive black holes)
Astronomers detected a smirch in the data, indicating a possible black hole companion.
天文学家在数据中检测到一个涂抹啁啾，表明可能存在一个黑洞伴星。
用法提示：此处 smirch 为名词，指时频图上有涂抹状外观的啁啾信号。
A smirch appears when a massive object orbits a supermassive black hole and distorts the emitted radiation.
当一个大质量天体绕超大质量黑洞运行并扭曲发出的辐射时，就会出现涂抹啁啾。
用法提示：smirch 是主语，表示一种因轨道运动引起的辐射啁啾。
The team found several smirches in the time-frequency plot, each linked to a different orbital motion.
团队在时频图中发现了几个涂抹啁啾，每一个都与不同的轨道运动有关。
用法提示：smirches 是 smirch 的复数形式，仍指涂抹状啁啾。
smirch 在此为天文学术语，指在时频平面上呈现模糊外观的辐射信号，而非日常所说的“污点”。
The astronomers spotted a smirch in the time-frequency plot.
天文学家在时频图上发现了一处模糊的涂抹状信号。
用 from 引出信号的来源天体。
They recorded a smirch from a massive body orbiting the supermassive black hole.
他们记录到一处来自环绕超大质量黑洞运行的巨大天体的模糊信号。
复数形式为 smirches；associated with 用于说明该信号与哪类天体有关。
The data showed several smirches associated with orbiting bodies.
数据中出现了几处与环绕运行的天体相关的模糊信号。
smirch 是天文观测里在时频图上呈模糊外观的短促辐射信号；smirk 指人得意或自满的笑容，二者仅拼写和读音相近，意义和用法都不同。
smirch 特指时频图上呈模糊外观的天体辐射啁啾；chirp 泛指频率随时间变化的短促信号，不强调模糊外观，也不限于天文来源。
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