相較之下，YouGov是「自願參加」的調查平台，人們自行報名以換取積分，積分可兌換現金。
"It's producing fragments of building stone, so it might be structural. We might be thinking of a small shrine or a chapel," says Dr Andy Seaman, from Cardiff University, who is leading the dig.
。业内人士推荐旺商聊官方下载作为进阶阅读
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