As long as重要有以下几种用法：

1、as long as（连词）只要……；只要……就

You can stay here as long as you clean up after yourself.

只要你在这里，你就得收拾干净。

2、as long as和……一样长

Of course, balloons do not last as long as conventional power stations (each is estimated to have a working life of about a year).

当然，气球不会和传统发电站寿命一样长（每只估计有一年的工作寿命）。

3、for as long as自……以来

It has been snowing, roughly every third day, for as long as I've had the flu.

自从我得了流感以来，这段时间一直在下雪，大约每三天一场。

参考双语例句：

Regarding treaty law, it says that the rules set out in international conventions duly ratified or approved shall come into force in the Portuguese internal legal order once they have been officially published, and shall remain so for as long as they are internationally binding for the Portuguese State.

关于条约法，《宪法》规定，经正式批准或核可的国际公约规定的规则一旦被正式公布，就在葡萄牙国内法令内生效，并且，只要这些规则对于葡萄牙国来说具有国际约束力，就应继续有效。

Regarding treaty law, it says that the rules set out in international conventions duly ratified or approved shall come into force in the Portuguese internal legal order once they have been officially published, and shall remain so for as long as they are internationally binding for the Portuguese State.

关于条约法，《宪法》规定，经正式批准或核可的国际公约规定的规则一旦被正式公布，就在葡萄牙国内法令内生效，并且，只要这些规则对于葡萄牙国来说具有国际约束力，就应继续有效。