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。
An even harder situation is to be on the platform in good time for a train and still to see it go off without you.
更难堪的情况是虽然及时赶到站台上,却眼睁睁地看着那趟火车启动,把你抛下。