Regulations such as minimum operating age, restricted operating areas and compulsory classes in water safety are essential.

诸如最低操作年龄、限制操作区域和水上安全必修课等规定是必不可少的。

youdao

In operating areas no individual container of Class I or II liquids shall exceed five-gallons (19 l) capacity.

在操作区域内，单个的盛装i类及ii类液体的容器不得超过5加仑(19 L)的容积。

youdao

Work with other operating areas to address machining, tooling and maintenance issues that may arise in the manufacturing process.

与其他操作区域合作解决机床、工装和维修等生产过程中可能发生的问题。

youdao

And he says that is already happening in areas where forces President Obama deployed earlier this year are operating.

VOA: standard.2009.11.04

U.S.officials have never confirmed the use of Predator drones, but it is widely reported that the Central Intelligence Agency has used them to kill suspected terrorist leaders operating in Pakistan's largely ungoverned tribal areas along its border with Afghanistan.

VOA: standard.2009.10.27

Concho's core operating areas are located in the Permian Basin region of Southeast New Mexico and West Texas, an onshore oil and natural gas basin in the United States.

FORBES: Concho Resources

If Gov. Andrew Cuomo were to order the National Guard to assist, each of New York's Guard's six operating areas will be ready to deploy 10 Humvees and 40 troops trained in disaster response.

CNN: Monster blizzard set to slam Northeast

It has been active during the deteriorating weather with 4x4 vehicles operating in areas vulnerable to adverse conditions, but a spokeswoman said fewer calls would ensure that genuine emergencies can be attended to appropriately.

BBC: Wales snow: Amber 'be prepared' warning of heavy falls