会议上，我们进行了一场天马行空的讨论，不考虑任何现实限制。

In the meeting, we had a ___blue-sky discussion without considering any practical constraints.

她的蓝天思维计划听起来很棒，但完全不考虑预算限制。

Her ___blue-sky thinking sounds amazing, but it completely ignores budget constraints.