It could be days or months, all winter in fact; but see the heart really doesn't need to do any pumping now, because the blood is frozen too.

可能短则几天，长则几个月，甚至整个冬天；不过你看它的心脏现在不怎么需要泵血，因为血液也冻结了。

youdao

Heart rate tracking for three of the Alaska bears showed a drop from 55 beats per minute on average before hibernation to 14 erratic ones per minute in winter.

对三头阿拉斯加的黑熊的心率追踪显示出它们在冬眠前的平均每分钟 55 下降低到了冬天里每分钟飘忽不定的 14 下。

youdao

Winter is on my head, but eternal spring is in my heart.

冬季已临到我的头上，永恒的春季却在我的心头。

youdao

City officials decided late last year to use modular construction to replace the destroyed buildings at the beaches, in part to avoid building outside in the heart of winter.

WSJ: Bathrooms' Long Trek to Replace Sandy-Wrecked Facilities