First, we must verify the detection of phosphine itself, and then later, we would have to confirm that this gas is coming from life and not from some unexpected geological or photochemical process.

首先，我们必须验证磷化氢本身的检测，然后我们必须确认这种气体来自生命，而不是来自一些意想不到的地质或光化学过程。