以冷轧薄板、中厚宽钢带为例，2016至2025年期间，它们的年复合增长率分别为2.9%、6.7%，远高于粗钢整体表观消费量的增速。可以看出，中国钢铁需求重心正在从建筑用钢转向工业制造。
但如果是早晚高峰挤广州地铁三号线的时候，倒是可以考虑打开第二档。
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Modernising phrases
02 生态卡位战：抢流量，还是抢习惯？
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We can modify our ZK credential to support a limit of N shows as follows. First, let’s have the User select a random key K for a pseudorandom function (PRF), which takes a key and an arbitrary input and outputs a random-looking outputs. We’ll embed this key K into the signed credential. (It’s important that the Issuer does not learn K, so this often requires that the credential be signed using a blind, or partially-blind, signing protocol.3) We’ll now use this key and PRF to generate unique serial numbers, each time we “show” the credential.
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