This paper narrates the effect and the demand of titanium liquid filter aid; and introduces the use of diatom earth filter aid in the manufacture of titanium white by sulfuric acid method.

叙述了钛液助滤剂的作用及其要求，并介绍了硅藻土助滤剂在硫酸法钛白生产中的应用。

youdao

It would also need good shielding and special electronics to filter the DSSS signal from the radio-noise created by the Earth, the sun and the rest of the galaxy.

同时还需要良好的外层保护和特殊电子器件，从地球、太阳及其太空中传来的无线电“杂音”中过滤出dsss信号。

youdao

IceCube takes advantage of neutrinos' slipperiness, using Earth as a filter of more interactive particles.

冰立方利用了中微子的滑溜，将地球作为一个对更容易发生相互作用的粒子的过滤器。

youdao

It acts as a sunlight filter, shielding life on Earth from harmful ultraviolet rays that put humans at greater risk of skin cancer and cataracts and harm marine life, the agency said.

CNN: Ozone hole grows in 2008

Some scientists, giving their imaginations free rein (and extrapolating from Earth's own sea creatures), have suggested filter-feeders, such as whales.

FORBES: We've Got Company

Like the astronauts aboard Apollo 13 who had to build a CO2 filter from whatever was available in their capsule under the direction of engineers back on Earth, we are forced to innovate in real time.

WSJ: Tony Hayward: What BP Is Doing About the Gulf Gusher