A tree map, a style of chart used on this blog for the first time, indicates the relative popularity of the top 20 charts.

本博客首次使用的图表方式——树型图表表明了20张最热门的图表的相对受欢迎程度。

youdao

This is not the first time a lab-engineered trachea has been used for transplantation.

这已经不是首次实验室制造的气管被用于移植。

youdao

This serious vulnerability (which apparently Apple sat on for over a month) is probably the first time that most people have heard of mobile phones being used to create botnets.

这一严重的漏洞(显然苹果对这个问题拖延了个多月)可能让大多数人第一次听说了手机也可以形成僵尸网络。

youdao

However,this is not the first time the mine has been used for science.

VOA: special.2009.07.21

When the mini came out and I used it for the first time, I said oh yah this is it!

FORBES: Turning Your iPad Into A Filmmaking Camera - Meet The iOgrapher

She used this technique in 1993 -- for the first time anywhere -- to treat farsightedness.

CNN: Her vision: Better, clearer sight

Assam Forest Minister Rockybul Hussain said this was the first time that drones had been used for wildlife protection anywhere in India.

BBC: India deploys drones to save rhinos in Assam state