在很久很久以前，你可以跟很多人约会，直到有一天你对某人许下了千金一诺。
In the old days, you could date multiple people until you decided to commit to one person.
直到现在以前，实验中已经制造出了反原子，即反氢原子，但是只是在自由态下。
Until now, experiments have produced anti-atoms, namely of hydrogen, but only in a free state.
直到大约15分钟以前，在我的房间附近，在楼梯里，都枪声不断，是自动武器的枪声。
"Till about 15 minutes ago, near my room, in the stairwell, there was lot of firing going on, automatic weapons," says a guest.
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