With stiffer fuel economy regulations looming , ford introduces a mustang boss 302 with a four-cylinder ecoboost engine .

由于更严格的油耗规定即将出台，福特汽车将推出搭载四缸EcoBoost引擎的野马Boss302（MustangBoss302）。

For that reason , the solution is not merely tougher laws and stiffer penalties .

因此，解决的方法不仅仅是更严格的法律和更严厉的处罚。

But times changed and the competition got stiffer .

但时代已发生改变，竞争也变得更加激烈。

In europe 's monetary union , for example , berlin is pushing for a stiffer set of fiscal rules .

例如，在欧洲货币联盟，德国政府正努力推动制定一套更为严格的财政规则。

This pressure on china is now being met with stiffer resistance .

这种针对中国的压力，如今正遭到更强硬的抵制。