The system is both practical and ecologically sound.

这个系统不但切合实际，从生态学观点来看也是合理的。

《牛津词典》

It is economical to run and ecologically sound.

它运行高效且有益生态。

《柯林斯英汉双解大词典》

Decleor's caring attitude does not stop at your body, as they also use ecologically sound ingredients, avoid synthetics and do not test their products on animals.

思妍丽的关怀态度不只停留在您的身体，他们同样在配方中运用有生态学基础的成分，避免使用人工合成材料，也不会进行动物实验。

youdao

The fowl are raised in an ethically and ecologically sound manner, and the geese are not force-fed to produce the foie gras on offer.

BBC: In Qu��bec, an island of local food

Panasonic's company wide commitment to sustainability and producing products that are ecologically sound is evidenced in the 100, 000 hour life span of the Plasma Display panel and the lack of lead or mercury in the panels.

ENGADGET: Panasonic unveils Infinite Black Ultra Panel plasmas for 2012 (eyes-on)

Paxit is both ergonomically and ecologically sound.

FORBES: One Way To Fix Health Care's Obesity Problem