It's perfectly valid to add input filtering on top of type=email if you want to further restrict the input set. Maybe you hate people with gmail addresses or only want to allow email addresses at your local firm (both examples from before!). In that case, having a more restrictive pattern makes sense.
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他認為，雖然「原則上」政權更迭或許受到歡迎，但這些國家反對局勢升級，並將尋求降溫，「只是目前尚未看見明確路徑。」
LFortran by default has bounds checking on, and it will give runtime errors。爱思助手下载最新版本对此有专业解读
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