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。
I was so tired I couldn't keep up with her.
我太累了,跟不上她的步伐。
Who could have imagined, in the mid 1970s, for example, that by the end of the 20th century, computers would be as common in people's homes as TV sets?