It may be that our bodies evolved to depend on at least low levels of worm-produced compounds to keep them running within normal bounds.

而人类身体的进化又需要依赖这种由蠕虫产生的至少低水平的化合物才能保证其在正常范围内运作。

youdao

You must keep your hopes within reasonable bounds.

你必须把你的希望寄予合理的范围之内。

youdao

It hopes to join the ERM-2 (a pledge to keep the exchange rate within agreed bounds for two years) early next year in order to qualify for euro membership by 2012.

它希望能够在明年年初加入ERM - 2(保证在两年内将汇率固定在约定的范围内)，以便能够在2012年前取得欧元区成员国的资格。

youdao

Look closely at the strange arithmetic that Congress uses to keep budget deficits within bounds.

FORBES: Take Your Chances

Moreover, although Mr Tremonti's repeated tax amnesties have seemed to keep annual budget deficits within bounds, the price of this may have been to increase Italy's already high level of tax evasion.

ECONOMIST: Why Italian politics is impossible

The Kremlin tried to manage the discontent, backing a plan by the billionaire businessman Mikhail Prokhorov to revive a pro-business political party that would help to keep the middle class within the bounds of the system in the December elections.

WSJ: Russia After Putin