It's a tough business to break into.

唱歌那行不是那么容易混的。

But it is a tough business, he explains.

但是他说，这一行竞争激烈。

And low-cost intercontinental travel has historically been a tough business.

从历史上看，廉价洲际旅行一直是一项艰难的业务。

Concert promotion's a really, really tough margin business whereas ticketing, on the other hand, is a very high-margin business.

演唱会推广是一项非常非常艰难的利润业务，而另一方面，票务是一项非常高利润的业务。

But for the company that can deliver you almost anything, almost anytime, grocery has proved a tough business to crack.

但是对于这个几乎可以在任何时候为你提供任何东西的公司来说，食品杂货已经被证明是一项艰难的业务。

Well, it was a farm in Cornwall in southwest England and I learned that farming is a really tough business.

嗯，那是英格兰西南部康沃尔郡的一个农场，我了解到务农是一个非常艰难的行业。

And we had to make some tough business decisions along the way, and not everyone made it.

在此过程中，我们不得不做出一些艰难的商业决定，但并不是每个人都做出了决定。

Such struggles with officialdom make a tough business even harder. Some 3m wrecks pepper the ocean floors, according to the UN (though few contain riches).

与政府的纠缠让本就艰难的寻宝生意更加艰难。据联合国称，大概有300万艘沉船遍布海底（只有少数沉船中藏有宝藏）。