Self pollution rate of organic matter in cultural shrimp pond was quantitatively determined by organic matter flux in cultural waters.

利用养殖期间水体中颗粒有机质垂直迁移通量，测定了虾塘自污速率；

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Maintaining safe speeds and being electric, self-driving cars would drastically reduce pollution levels and dependency on non-renewable fuels.

保持安全速度和电力驱动的自动驾驶汽车将大幅降低污染水平，减轻对不可再生燃料的依赖。

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Is your soul not poverty and pollution and wretched self - complacency?

难道你们的灵魂不是贫乏、污秽与可怜的自满？

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Major problems may, as we are assured, be very unlikely, but if something does go badly wrong with GM crops we will be faced with a form of pollution that is self-perpetuating.

BBC: Prince Charles speaks out against GM food

Toto, the Japanese toilet company, already sells the ubiquitous self-warming toilet which creates pleasing sounds for camouflaging, um, "noise pollution".

ENGADGET: The Japanese Home of the Future