讯号对遮蔽比 signal-to-masking ratio
比遮蔽
Specific shield
以上为机器翻译结果，长、整句建议使用 人工翻译 。
由于冷空气下沉，这些斑点被遮蔽，它们通常比周围的地区要冷得多。
Since cold air sinks, and these spots are shaded, they are usually much cooler than the surrounding area.
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模块下移
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