According to the falling rate, the content of mercury in the deposit will reach the background value after 32.57 years.

按此下降速率，沉积物的汞含量经32.57年可达到背景值水平。

youdao

The preservative distribution is relative to the pressure and its falling rate. The optimum temperature and time for treatment vary with the species of wood.

处理过程中的压力及处理结束时的卸压时间对防腐剂分布影响较大，而最佳处理温度、时间则随树种而异。

youdao

Worse, the numbers are now falling at an accelerating rate.

更糟糕的是，这些数值现在正在加速下滑。

youdao

The researchers say the maternal death rate has been falling almost one and a half percent a year since nineteen ninety.

VOA: special.2010.04.14

Home prices are falling at the highest rate we've ever seen. I have my own index s Case-Shiller indexes the Standard & Poor's Case-Shiller indexes and we announced our indexes yesterday.

房价正在以我们从未见过的速度下跌,我有自己的一个指数,名字叫The，Standard&Poor’,而且昨天我们公布了我们的指数。

耶鲁公开课 - 金融市场课程节选

One piece of evidence supporting this is the falling rate of violent crime in states permitting honest citizens to carry concealed handguns.

FORBES: To Protect The Innocent, We Need More Guns In The Hands Of Honest People

Almost certainly, charges will be dropped although, if arrests continue at the current rate (over 1, 000 so far), they may yet reverse New York's falling crime rate.

ECONOMIST: The New York Police

America's weak economy, and the falling birth rate in Mexico further reduce the incentives to cross.

ECONOMIST: The Republicans are fretting about a disappearing problem