And this isotherm has shifted in the same rate as the swans shifted eastward.

5摄氏度的移动速度与比尤克斯天鹅向东移动的速度相同。

Trewartha's decision to use  the 10 celsius average isotherm over 8 months of the year was driven  mostly by predominant vegetation type.

Trewartha 决定在一年中的 8 个月内使用 10 摄氏度的平均，要是由要的植被类型驱动的。

So to cater for the mob, I have developed my  own isotherm to separate out the Cfa zone into what would be perceived as either a cool or mild  winter.

因此，为了满足大众的需求，我开发了自己的，将 Cfa 区域划分为凉爽冬季或和冬季。