也許可以理解的是，當 Instagram 上無數廣告向我承諾只要每天花不到 30 分鐘就能在 30 天內（甚至更快）教會我一門語言時，我總是反應得相當抗拒。
It made me wonder, how damaging would it be for an active business? A few hours of downtime costs real money. For me it costed only time.
，这一点在safew官方版本下载中也有详细论述
Musician Letty Stott plays a replica of a carnyx to Fraser Hunter, presenter Alice Roberts and Gary Trimble during filming for Digging for Britain
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