In additional experiments, the researchers injected a drug into the brains of older mice to counter the drop in acetyl tag attachment, or acetylation.

在另一个实验中，研究人员给年老的老鼠脑部注入了一种药物来阻止它们脑部乙酰物质的流失，帮助它们的脑部产生乙酰作用，结果完全在研究人员预料之中，辅助记忆的基因发挥了作用，年老的老鼠也可以像幼鼠那样恢复对以前事情的记忆。

youdao

Here's why: the next time you drop off a prescription order, you might see a robot behind the counter.

原因：下一次你递处方的时候，很可能是一位机器人站在柜台后为你服务。

youdao

Without its six fly-bys—which used the gravitational fields of the planets involved to counter that effect—Messenger could not have slowed sufficiently to allow it to drop into its intended orbit.

没有这六次“飞经”（利用各行星重力场的作用），就没办法使信使号降到能滑进水星轨道的速度。

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And it's this very measure that they were forced to drop from the Counter Terrorism Bill earlier this year after clear signs that MPs and peers would oppose inquests behind closed doors.

BBC: The inquest that may never be

The drop may seem counter-intuitive due to the better-than-expected GDP figures, but Hogan said the relationship between bonds and stocks is skewed from historic norms because bonds already so low due to disruptions in the credit markets emanating from the U.S. subprime crisis.

FORBES: GDP's Health Misleading

It has been restructuring over the past two years to try to counter a drop in ferry passengers, partly thanks the phenomenal growth of low-cost airlines like Ryannair and stiff competition from the likes of Eurotunnel.

FORBES