In static balance, head extension has an obvious disturbing effect on the vestibular organ, but in dynamic balance, it has a weaker disturbing effect.

静态平衡时，头后仰对前庭器官的干扰效果较为明显，但动态时干扰效果明显较弱。

youdao

Once you've installed the extension, head to any video page, and then click the DownloadHelper button button (see screenshot below) to see a list of the available media to download on that page.

一旦装了扩展，访问视频页面，然后单击“Video DownloadHelper”按钮(见下方截图)，就会看到这个页面上可下载的视频列表。

youdao

Head begins to lift through an apparent cervical extension.

头部通过一个明显的进步伸展开始抬高。

youdao

Wilson, who studies the on- and off-field happenings of baseball as closely as anyone, explained that every player has a magic number in his head for what it will take to sign an extension, and if his club hits it, he signs.

WSJ: Baseball Free Agency Dies of Neglect -- Matt Cain, Joey Votto, Andrew McCutchen, Matt Kemp Opt for Long-Term Deals

Meanwhile assistant head coach Andy Hay has signed a one-year extension with the Tigers.

BBC: Castleford hand Arundel contract

It was reported this week that the University of Texas regents will deliberate offering head football coach Mack Brown a four-year contract extension.

FORBES: Texas Could Make $23 Million Mistake With Mack Brown Extension