We've heard it so much that sometimes we don't take it seriously.

这句话我们听得太多了，以至于有时并不把它当回事。

youdao

He is joking. Don't take it seriously.

他是跟你开玩笑呢。你别当真。

《新英汉大辞典》

He was joking. Don't take it seriously.

他是跟你闹着玩儿的，你别当真。

《新英汉大辞典》

Definitely there are people out there who don't take it seriously - think there's no harm - but most of us are aware of the safe sex message.

BBC: 20% of new HIV cases in Northern Ireland are men over 45

Have fun, don't take it too seriously, forget who won five seconds after it's over.

WSJ: Jason Gay: Building a Child Sports Prodigy (Kidding)

For many conservative activists attending CPAC, the straw poll is fun, but they don't take it too seriously.

CNN: Possible 2016 candidates make CPAC pilgrimage