The two most popular explanations of origin are that the belief goes back to pagan times when we believed in tree spirits, or that we are invoking Christ’s protection by referring to the wood of the Cross. The former is nothing but guesswork, based on the conviction that all superstitions must be ancient, and it has the usual problem of spanning thousands of years with no evidence at all of its existence, or, for that matter, any evidence that ‘we’ ever believed in tree spirits.
（四）具有批量网络地址自动切换，批量接收、提供短信验证、语音验证功能的；，更多细节参见同城约会
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2021 年—2025 年，中国企业科创力数据库去重后的入库企业数量从5848 家增至7056 家，增加了1208 家，五年增长了两成（20.66%）。同期，披露研发投入的企业从4412 家增至5915 家，增加了1503 家，五年增长三成多（34.07%）；披露研发人员的企业从3895 家增至5309 家，增加了1414家，也增长了三成多（36.30%）。