他们翻山越岭，为的是向零售商和其他冬季运动爱好者推销和销售他们的产品。

They went from mountain to mountain personally promoting and selling their products to retailers and other winter sports enthusiasts.

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不过《当代生物学》杂志上的一项研究却表明，在冬季向鸟类投食可能会影响到它们的进化进程。

But a study in the journal Current Biology suggests that feeding birds in winter can influence their course of evolution.

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因此，海洋向这交界面提供的所有热量都会导致冰面在夏季的减少以及在冬季形成速度的减缓。

Hence, any heat provided by the ocean to this interface will lead to thinning of the ice in summer and to slower ice growth in winter.

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And the change from summer to winter is so beautiful.

从夏季向冬季的过渡真是太美了。

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