know backwards

Anybody who compiles a dictionary has to know his alphabet backwards.(无论谁编字典都得把字母表记得熟透。)

All of us know this backwards and forwards.(我们大家对此都了如指掌。)

I know the extra two characters are annoying; I know this will break backwards compatibility.(我知道这两个额外的符号十分讨厌；我也知道这将会破坏向后兼容性。)

'Those young people didn't seem to know when I was tired,' he said, 'so I just threw them off backwards.(“那些小孩似乎不知道我会累，”他说，“所以我就把他们向后面甩下去。”)

Up to now all Chinese people know them, and some old people can even recite them backwards.(这五个问题至今没人不知道，老一点的还能倒着背。)

Every actor ought to know his lines backwards before he goes on stage, as nervousness may make him forgetful.(所有演员在上台前都应当把台词记得滚瓜烂熟，因为一紧张就容易忘词。)

My whole life, I have been bending over backwards to protect your feelings. And you know what? It's not my fault you're so insecure.(我的一生，总要卑躬屈膝，掩藏自己，顾着你的感受。知道吗，你的自卑心理不是我的错。)

You’ve probably been underestimating these times. Once you know these times, you can plan backwards so that you show up 10 minutes early each time.(估计一下做准备得花多长时间，要花多长时间到达目的地，你就会大致的算出这些时间，一旦你了解了这些，你就可以提前做好计划，提前十分钟到达单位了，这种感觉会很好的。)

She must know the play backwards by now.(她现在对这个剧本肯定是倒背如流。)

This device isn't a spaceship. It's a time machine. It goes backwards, forwards, takes us to aplace where we ache to go again, to a place where we know we are loved.(这个投影机不是宇宙飞船，而是时光机，它载我们前进或后退，让我们愿意忍痛重温记忆，因为在那里，我们知道自己曾被爱过。)