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zhè zhǒng yóu zhèng fú wù sù dù shì yǒu fǎ lǜ guī dìng de
这种邮政服务速度是有法律规定的。
The speed of postal service was legally regulated.
yóu zhèng fú wù zhì liàng
邮政服务质量
postal service quality
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