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.
广州歌剧院发言人刘小路说：“在短时间内广州歌剧院就已经改变了这儿的文化景观，这在以前是相对受限制的，直到目前才改观。
Liu Xiaolu, a Guangzhou Opera spokesman, said: “In a short period of time it has changed the cultural scene here, which was relatively limited until recently. Before it was just Beijing and Shanghai.
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