你会看到它们停下来，拿住一只橡子慢慢品尝；或者看到它们收集橡子，又很快地跳走，把橡子藏起来。
You may see them stop and enjoy an acorn, or you may see them collecting acorns and running off to hide them.
你可能认为它们很难入睡，但它们没有这样的问题，因为长颈鹿不经常停下来打盹。
You may think it's difficult for them to sleep, but they have no such problems because giraffes don't often stop for a snooze.
当老鼠闻到气味时，它们会停下来摩擦自己的腿，这表示样本已被感染。
When the rats detect the scent, they stop and rub their legs to indicate a sample of infected.
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