Having been used for a long time, a indistinctive symbol will gain "secondary meaning" and become distinctive.
商标必须具有显著性，但一个不具有显著性的标记在长期使用后会形成“第二含义”而获得显著性。
Bluish green light flashed six to seven times like lightening bolts, and there indistinctive sounds like drumbeats; soon, an earthquake struck.
见碧光闪烁，如电者六七次，隐隐有声如雷鼓，巳而地震。
Bluish green light flashed six to seven times like lightening bolts, and there indistinctive sounds like drumbeats; soon, an earthquake struck.
见碧光闪烁，如电者六七次，隐隐有声如雷鼓，巳而地震。
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