Experts say the ability to take up lead is reduced when the pH level is above six and a half.

VOA: special.2009.06.09

When the temperature gets above the level you want it to be.

就在当温度超过你想要的温度时

耶鲁公开课 - 生物医学工程探索课程节选

And that is the highest point in Israel, it rises about 10,000 feet above sea level. The central mountain area, those are between 4000 and 10,000 feet above sea level.

那是以色列的最高点，它大约在海平面以上10000英尺，中央的山区，大约在海平面以上4000到10000英尺之间。

耶鲁公开课 - 旧约导论课程节选

The nesting grounds for pelicans, gulls and other water foul, they rise less than 30 centimeters above sea level.

VOA: standard.2010.05.09

And nine months later, they leave honor above great level, begging for some more work and wanting to hang out with you on the weekend.

九个月后，他们成绩优异，恳求更多作业,希望与你共度周未。

哈佛公开课 - 幸福课课程节选

The land surface pokes just a couple of meters on average above sea level, making it the lowest-lying nation in the world.

VOA: standard.2009.10.17

Many of the islands that make up the Maldives rise little more than one meter above sea level, and could disappear under the sea if global temperatures continue to rise.

VOA: standard.2009.11.09

It wasn't just the beauty of the polished stone block walls or the fact that this abandoned city sits atop a narrow ridge more than 2400 meters above sea level.

VOA: standard.2009.12.15