Many things in the world are transitional. It's not that a child is not good at mathematics. You always have to work hard at it.
Some people dream of success while others wake up and work hard at it. 有些人還在夢想成功時，另一些人卻已經醒來努力為之奮鬥了。
When you really like what you're doing, you work very hard at it.
"The best way to build confidence in a given area is to invest energy in it and work hard at it," says Schwartz.
He worked so hard at it that he got ill.
Ever since grade school, I was told to get good grades so I worked hard at it.
If you want to play, you're going to have to work really hard at it.
Jackson longed to please people and worked hard at it all his life: he tried to satisfy his demanding and abusive father, his insatiable fans, his own bottomless ambitions.
Nowadays, those who make English their study no longer work hard at it, and research papers are no longer translated into English, French, German or Japanese for exchange with other countries.
Whether you're just starting to make your dream a reality or you've been working hard at it for years, cultivate the feeling that there are no mistakes, just more learning opportunities.
Some people dream of success, while others wake up and work hard at it.
It's impossible to learn a foreign language without working hard at it.
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