Available zinc in soil was lower than the critical level.

土壤有效锌含量低于临界值。

youdao

It appears, therefore, that we have a sort of asymmetry on the two sides of the critical level above which true inflation sets in.

所以，事情表现为：在真正通货膨胀到来以前的临界水平的两边有一种不对称的现象。

youdao

It is necessary to drop the infection efficiency by over 85% through protection measures for reducing the basic reproduction rate below the critical level.

防护措施必须使感染效率下降85 %以上，才能使医院内传播的基本繁殖率降至临界值以下。

youdao

"The critical part at the end of whatever the level of study you are going to do is to get yourself involved in something that puts you into a laboratory."

VOA: standard.2010.05.10

Nevertheless, the four-week moving average of jobless claims fell by nearly 6, 000, to 375, 000, still a multi-year low and still below the critical level of 400, 000.

FORBES: Daily Wrap

What I know for sure is that the Iraqi security forces will reach the critical mass level where we have turned the tide around and the insurgents and the terrorists are on the run and we are chasing them.

NPR: An Iraqi Perspective on Ending the War

Prof Edgerton speculated that "we are activating the spinal cord to a critical level" close to the level which would trigger movement, and a small signal from "the brain pushes it over" leading to movement.

BBC: Paralysed rats 'learn to walk'