In order to fight, we should put all our strength twist a rope, and that these forces concentrated in a single attack point. — Engels.
为了进行斗争，我们必须把我们的一切力量拧成一股绳，并使这些力量集中在同一个攻击点上。——恩格斯。
2
It is not only a country's economic and technological strengthconcentrated performance, but also a powerful driving force for promoting social progress.
它不仅是一个国家经济和科技实力的集中表现，而且是推动社会进步的强大动力。
3
If you do use coffee, just use what would be considered regular strength coffee in America, not something super concentrated like espresso.