本次官方恐怖威胁是自2005年7月7日的那次爆炸以来，是四年内等级最高，最为严重的一次威胁。这次威胁的严重性已超越7月分的那次爆炸。

The official terror threat was at the severe level for four years after the July 7 bombings in London in 2005. It was downgraded last July.

youdao

本次官方恐怖威胁是自2005年7月7日的那次爆炸以来，是四年内等级最高，最为严重的一次威胁。这次威胁的严重性已超越7月分的那次爆炸。

The official terror threat was at the severe level for four years after the July 7 bombings in London in 2005. It was downgraded last July.

youdao