But even Japanese automakers still have more work to do before fuel-cell or electric vehicles are completely environmentally friendly.

但是要使燃料或电动交通工具对环境完全无害，即使是日本制造商也还有很长的路要走。

youdao

The products made by both companies are completely recyclable, environmentally friendly and create woods that are actually harder than most tropical hardwoods.

这两家公司的产品是完全可循环利用的，利于环保的，并且比多数热带硬木更加坚实。

youdao

Environmentally friendly, Zero emissions (completely green).

环保零排放，绝对绿色。

youdao

A team from the University of Warwick has built what it calls the world's first completely environmentally friendly Formula Three racing car.

VOA: special.2009.11.03