Know

 我生命中有一些朋友的另一半是他們唯一交往過的對象。

有時候我看著他們 會不由自主的好奇這會是什麼樣的感覺呢？可以不知道分手的苦澀，並且 - 理所當然的 - 認定了這麼一個人。

是因為他們不知道（任何其他人），還是因為他們知道（這個人值得他們的努力）？ 

Some people in my life have married the one only person he/ she has dated.

I sometimes look at them and can not help but wonder how it would feel, to not have known the bitterness of breakup, and to be so certain - by default - about being with this one person.

Is it because they don’t know (anyone else), or because they know (that this one is worth their effort)?