If you want to pay online, you need to register an account and provide credit card information. If you don't have a credit card, you can pay with bank transfer. With the rise of cryptocurrencies, these methods may become old.
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。关于这个话题，heLLoword翻译官方下载提供了深入分析
The result from Step 2 is a high-level route – a sequence of shortcuts connecting border points.
int halftone_matrix[8][8] = {