现在，我们谁也不想陷入进不了自己家门的境地，但请务必花点时间想一想，把备用钥匙放在哪里才是最好、最安全的地方。

Now, none of us want to be in the situation where we can't get into our own home, but do take time to think where the best and safest place is to leave your spare keys.

youdao

把能量储存在一个地方，保护起来，为怀孕和养育孩子备用。

It's the way to store energy in a place that protects it, packs it away, and keeps it for pregnancy and for nursing the baby.

youdao

如果你住的地方经常下雪，务必在行驶时带上雪铲、手电(最好装有警戒灯)、毛毯、备用手套等东西以应急。

If you live in region where it snows, do keep the snow shovels to be kept in cars, along with a torch (preferably with a blinker built in), a blanket, spare gloves, etc.

youdao

It's the way to store energy in a place that protects it, packs it away, and keeps it for pregnancy and for nursing the baby, so it's very important from a reproductive point of view.

这样把能量储存在一个地方,保护起来,为怀孕和养育孩子备用,从生殖观点来看这是很重要的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选