In a word, the route is very clean and friendly to the environment.
本合成路线经济合理，无“三废”产生，属于环境友好过程。
In my opinion, it's very clean, quiet. The people are very friendly and polite.
我个人认为，这个国家很清洁，安静，人们非常友好也很有礼貌。
Hydropower is a clean, renewable, and environmentally friendly source of energy.
水电是一种清洁、可再生，且对环境友好的能源。
But the sky is still blue, the air is still clean, and the people are very friendly.
但家乡的天空依然蔚蓝，空气清新，河水甜美，人们相处融洽。
They are clean friendly, smart and have great memories.
它们友好，聪明及拥有很棒的记忆。
It's family operated, but is clean, tidy and friendly, like all German we met.
旅社是家族经营，小巧，但整洁，舒适，如同我们遇到的德国人。
Battery cars use electric energy as their driving force, which is clean and environmentally friendly.
电瓶车是靠电能作为动力的，安静环保。
Battery cars use electric energy as their driving force, which is clean and environmentally friendly.
电瓶车是靠电能作为动力的，安静环保。
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