That's when the freezing level is far enough down in altitude where we can get so much snow.

当冰点高度足够低时，就会产生降雪。

The major gathering of oil exporting nations has failed to secure an agreement on freezing production levels to drive up prices.

为助推油价回升，主要石油输出国举行会议，但最终未能就冻产达成协议。