That is not just Barca's style all-attack, but efficient attack: where the team is able to attack without sacrificing much of its defensive potential.

那不是巴萨的疯狂进攻类型，而是非常高效的进攻：球队有充足的精力进攻而又不牺牲防守。

youdao

Many of those systems which run everything from subway systems to air-traffic control networks have since been linked to the Internet, making them more efficient but also exposing them to cyber attack.

WSJ: U.S. Program to Detect Cyber Attacks on Infrastructure