半小时内自制的千层面已经做好了，开心的日子。

Beautiful homemade lasagne in half an hour. Happy days.

在爸被诊断得白血病前，每年的春节是他唯一可以真正开心的日子。

Before the doctor diagnosed my dad had leucocythemia , every Chinese new year was his real happy days.

在火塘的日子，每刻都是开心的。

The life is happy in Huo Tang Bar.

我们都有开心的日子和糟糕的日子，美好的季节和不美好的季节。

We all have good days and bad days, good seasons and bad seasons.

对人工智能研究者而言，这确实是一些令人开心的日子。

These are indeed nice days for artificial intelligence researchers.