为了减少污染，城市实施了新的环保计划。

Wèile jiǎnshǎo wūrǎn, chéngshì shíshī le xīn de huánbǎo jìhuà.

In order to reduce pollution, the city implemented a new environmental protection plan.

这个新规定从下个月开始正式实施。

Zhège xīn guīdìng cóng xià gè yuè kāishǐ zhèngshì shíshī.

This new regulation will be officially implemented starting next month.

这个项目虽然设计得很好，但实施起来并不容易。

Zhè gè xiàngmù suīrán shèjì de hěn hǎo, dàn shíshī qǐlái bìng bù róngyì.

Although this project is well designed, it is not easy to carry out.