Sometimes.

有時候

I hope when I grow up quickly.

希望快點長大

When I grow up.

長大了

I find that I have lost my childhood.

發現失去了童年

When I am single.

單身時

I start to admire the sweetness of loves.

開始羨慕戀愛時的甜蜜

When I am in love.

戀愛時

I miss the freedom when I am single.

懷念單身時的自由

Many things always feel good when you are not obtained.

許多事情在沒有得到時感覺很美好

Only after you obtaining these.

得到后

do we begin to understand.

開始明白

"When we get we also lose"

我們在得到的同時也在失去