【 以下文字转载自 NewExpress 讨论区 】
发信人: redbomb (redbomb), 信区: NewExpress
标  题: 问一个英语语法的问题
发信站: 水木社区 (Sat May 21 15:19:01 2022), 站内

下面这句话：Two of the infected patients in the UK travelled from Nigeria, so it is likely that they are suffering from the West African strain, which is generally mild, but this is as yet unconfirmed.

最后半句话“but this is as yet unconfirmed” 中的 as 如何解释，能否直接删除？
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