adj. unsound
... 不致病的 non pathogenic; nonpathogenic 不致密的 leaky 不致密性 leakiness; untightness ...
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黑调是种老的原因，白调是结构不致密的原因，但你看不到白的元素的，因为白是通过灰来体现的。
Ming, my personal take is not just the structure, it has everything to do with its ground color as well. grit color and ground color are vitally important to manifest old mine jadeite.
youdao
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