可以帮我看一下这句话吗?
大家好,关于下面这句话,我有问题想请教大家...
Men on the moon? Impossible!
That was in 1865, at a time when people only dreamed about space travel.
为什么是用 at a time 呢?而不是 at that time 呢?可以请大家指导吗?谢谢!
参考答案:这里应该不是词组,应该分开理解,time这里是”时代”的意思,所以可以用a修饰,后面是when引导的定语从句修饰time.
That was in 1865, at a time when people only dreamed about space travel.
全句意为:那是1865年,在那个时代人类只能梦想太空旅行.