at a speed单独用没有of是什么意思?

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/06/12 21:03:39

at a speed of
以 ...的速度
不用of 还是以.的速度 ,比如at a high speed 高速再答：望采纳，谢谢^ω^
再问：没有pf光是at a speed是什么意思？
再答：还是 ”以。。。的速度“ 的意思，例如：

at a safe speed 以安全速度行驶
at a high speed 以很大的速度
at a double speed 以加倍的速度

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