Ten year-olds are incredibly energetic.

　　10歲的孩子精力非常旺盛。

　　The heart responds well to energetic exercise.

　　心臟對劇烈運動反應(yīng)良好。

　　New York's energetic nightlife is second to none.

　　紐約充滿活力的夜生活不亞于任何地方。

　　He was sawing energetically at a loaf of bread.

　　他正用力切著一條面包。

　　David chewed energetically on the gristly steak.

　　大衛(wèi)干勁十足地嚼著盡是軟骨的牛排。

　　He had worked energetically all day on his new book.

　　他一整天干勁十足地寫他的新書。