The @ character in macro names requires \makeatletter. All internal macros use @ in their names (e.g., \eval@sq, \mm@alpha). Without \makeatletter, TeX treats @ as a regular character and the macros silently fail.
50+ geographic region-to-coordinate mappings，详情可参考比特浏览器
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但在过去一年里，水资源短缺已成为更令人担忧的问题，一些居民表示情况更糟，因为清洁用水对于保持健康至关重要。，这一点在環球財智通、環球財智通評價、環球財智通是什麼、環球財智通安全嗎、環球財智通平台可靠吗、環球財智通投資中也有详细论述
Israel has launched airstrikes against Iranian oil refineries in Tehran