Learning to play the piano isn't easy. You have to work at it.

学弹钢琴不容易，你非得下功夫不可。

《牛津词典》

If you have to work as part of a team, you must learn to read people.

如果你不得不在一个团队中工作，你必须学会领会别人的意图。

《柯林斯英汉双解大词典》

When I was nine or ten someone explained to me that when you are grown up you have to work.

在我9岁或10岁的时候，有人跟我解释说，人长大之后必须工作。

《柯林斯英汉双解大词典》

"I think consensus is something that you have to work at and it's something that will happen by action."

VOA: standard.2010.06.11

So that, to think nothing is something you have to work at; it's something that you can be preoccupied with.

所以脑子里一片空白,也是需要你努力的事;,需要全神贯注的事。

耶鲁公开课 - 1945年后的美国小说课程节选

So if you don't know that then, of course,you have to work harder than other people.

如果你还不知道这些,那你当然要比别人花更多功夫了

耶鲁公开课 - 基础物理课程节选

So you have to work real hard to keep your clients from leaving you.

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Scientists have suggested that food tastes better when you have to work for it.

NEWYORKER: Thirstbar��vin

"You have to work very hard to get the land, " said Goodman's Mr. Pearce.

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