Backpressure: good in theory, broken in practice
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。关于这个话题，heLLoword翻译官方下载提供了深入分析
（一）从销售方取得的增值税专用发票上列明的增值税税额；，更多细节参见safew官方下载
The first of the two, commonly referred to as the timed substitution rule, forces a team to play a man down for a minute if a player takes longer than 10 seconds to leave the pitch. The second of the guidelines, dubbed the off-field treatment rule, removes a player from the match for a minute if they spend more than 15 seconds on the ground after an injury.