FT Professional
Reference, Jiri Jirat. On-line reference guide to RELAX NG.，这一点在PDF资料中也有详细论述
。Line官方版本下载对此有专业解读
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The bats soon begin to emerge, darting and swooping up and down the aisles, the amplified sounds of their bat chatter filling the historic building.，详情可参考电影