full of beans字面意思满满的豆子，这俚语是因为19世纪那会，豆子是最贵的马粮，马吃饱了，它可不就会充满动力的、精神饱满的、精力充沛的。

【例句】
The kids are really cute, but they're also full of beans.
这些孩子真可爱，但是他们也是精力充沛的。

You seem full of beans this morning, you must have a good night's rest.
你今天似乎精神饱满，我想这一定是因为昨晚休息得很好。