我以为这只是练习，但显然它是认真的。

I thought it was just a practice, but apparently it was ___for ___real.

你知道我是个卡萨诺瓦，但这次我知道是认真的。

You know I'm a Casanova, but this time I know it's ___for ___real.

气候变化的威胁是真实的，需要立即行动。

The threat of climate change is ___for ___real and requires immediate action.