That's a great drawing of your girlfriend, but you should emphasize the nose a bit more.
你的女友这张画像很漂亮,但你应该把她的鼻子再勾画一下。
We should learn the value of money and learn how many hours' work has to be done before we can buy something.
我们应该认识到钱的价值,知道要干多少小时的活,我们才能买某件物品。