... change sign key 变号键 rules change sign 规定改变记号图片 sign change 正负变换 ...
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rules change sign
规则变更标志
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In fierce market competition, the culture sign character of real estate advertisement is more and more strong, and the way and the rules of advertising creative expression have started to change.
以广告语境这一浸润着文化心理的研究为切入点，寻求房地产广告创意表达的有效途径。
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