Biofuels in the solid form has been in use ever since man discovered fire.

自从人们发现火就开始使用固态生物燃料。

youdao

Since the Huns had been there since the times, has been in use ever since.

自匈奴时代起就已出现，一直沿用至今。

youdao

Kaishu, graceful strokes has been in use ever since, as a standard font for the world love.

楷书，其笔画肃静严厉不断沿用至今，被视为规范字体而为世人所喜欢。

youdao

Of course, all these hysterics are based on nothing more than speculation and rumors, since basically no one's ever seen a whitespace device in use -- maybe if one of the giant companies backing the tech would actually demo some of this vapor, people wouldn't be so nervous about it.

ENGADGET: Wireless audio manufacturers unhappy with Google's whitespace internet plans