About two-thirds of Earth does not meet safe levels for freshwater supply, scientists said.

科学家说，地球上大约三分之二的地区没有达到淡水供应的安全水平。

All of it will be diluted with seawater to reach safe levels of radiation.

所有这些水都将被海水稀释，以达到安全的辐射水平。

The hydrogen sulphide that these men must breathe in is 40 times the safe level.

他们吸进的硫化氢是安全限度的四十倍。

The World Health Organisation considers a safe daily level to be 25 microgrammes per cubic metre.

世界卫生组织规定，日安全值为每立方米25微克。

The WHO recently strengthened its guidelines, and the evidence shows us there is no such thing as safe levels.

世卫组织最近升级了有关空气污染的指导方针，这告诉我们所谓的安全标准根本就不存在。

The maximum safe level of sound humans are thought to be able to withstand without potential damage is 80db.

人类能够承受的最大安全音量是 80 分贝。

Japan's government announced plans in April 2021 to slowly release the treated water, which it says meets safe levels.

日本政府在2021年4月宣布了缓慢排放经过处理的水的计划，称处理后的水达到了安全水平。

It reminds people to use their technology to stay safe. Smart phone apps can help to monitor safe listening levels.

还提醒人们使用技术来保证安全，智能手机应用可以帮助人们检测声音等级。

There is no safe level of secondhand smoke exposure which can cause a number of health problems, including asthma in children.

二手烟暴露并没有安全限值，它会引发很多的健康问题，包括儿童哮喘。

The research suggested there was no safe level of consumption whether with child or trying to conceive.

研究表明，无论是怀孕还是怀孕，都没有安全的消费水平。

The author of the new paper, claims thousands of babies are harmed every year when women consume supposedly safe levels of caffeine.

这篇新论文的作者声称， 当女性摄入理应安全水平的咖啡因时， 每年都会有成千上万的婴儿受到伤害。

So how do we establish a safe level of sugar consumption? In 1986, the US Food and Drug Administration (FDA) concluded that most experts considered sugar safe.

那么我们如何确定一个安全的糖摄入量呢？1986年，美国食品和药物管理局(FDA)得出结论，大多数专家认为糖是安全的。

Columbia University researchers using this machine found the vapor has toxic metals like chromium, nickel, zinc and lead and as we know, there's no safe level of lead.

哥伦比亚大学的研究者使用这种机器发现了气雾中含有有毒金属，例如铬、镍、锌、铅，而我们知道，只要含铅就是危险的。

Right now, the US Food and Drug Administration sets the safe level for BPA exposure at half a microgram per kilogram of body weight per day.

目前，美国食品和药物管理局将 BPA 暴露的安全水平设定为每天每公斤体重半微克。

In a few cases, we found that the sort of what we call the safe level of concentration of antibiotic in a river was exceeded by more than 300 times.

在少数情况下，我们发现所说的河流中抗生素的浓度水平超过了安全浓度的三百倍以上。

Many experts said that approach was not scientifically sound and that, in the real world, there are no safe levels of the fine particulate pollution associated with the burning of fossil fuels.

许多专家都表示，从科学的角度来讲，这种方法并不可靠，而且，在现实中，化石燃料燃烧产生的细颗粒物污染也不存在什么安全水平。

They were so worried about nosedives, for instance, that all of their early models had an elevator in the front, which would catch the air like a parachute and help provide a safe, level landing.

例如，他们很担心飞机俯冲，所以，他们早期的所有模型前面都有一个升降舵，升降舵可以像降落伞一样捕捉空气，并且实现安全、水平的着陆。

Thailand's Department of Pollution says, air quality in Bangkok has fallen to harmful levels as the amount of hazardous dust particles known as " PM2.5" exceeded safe levels in more than 40 areas around the capital.

泰国污染部说，曼谷的空气质量已经降到有害水平，首都周围40多个地区被称为" PM2.5" 的有害尘埃颗粒超过了安全水平。