1.dozens of 很多

Dozens of such groups exist in china.
中国有几十个这样的群体。

He was interrupted by dozens of demonstrators shouting anti-communist party slogans.
他一度被许多呼喊反对共产党口号的示威者打断。
2.believe in 相信,信仰

But I do believe in simplicity.
但是我相信有朴素主义。

We are doing what we believe in.
我们在做自己信仰的事。

3.digital age 数字时代

Might e-readers provide a new model for newspapers in the digital age?
电子阅读器能为报纸提供数字时代的发展新模式吗？

Google rank is critical to a business's success in this digital age.
在当今数字化时代，google搜索排名对商业的成功至关重要。

4.learn to 学会

Also, learn to work with a team.
还要学会与团队合作。

Learn to be a better listener.
学会做一名更好的倾听者。