We hail as masterpieces the cave paintings in southern France and elsewhere, dating back some 20,000 years.

我们把法国南部和其他地方的洞穴壁画赞誉为杰作，它们的历史可以追溯到大概2万年前。

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Now, researchers have presented the first randomized trial of what they hail as a side-effect-free, prescription-free and simply free appetite control agent.

最近，研究人员推出第一批随机试验品，他们称这为无副作用，非处方，仅仅影响食欲的控制剂。

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It plays an increasingly important part in meteorology for cloud, precipitation, hail and thunderstorm detection as well as the navigation of aircraft and ships.

它在对云层、降水、冰雹和雷暴的气象探测以及在船舰和飞机的导航中，起着日益重要的作用。

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While prosecutors call Kevorkian a murderer, Thomas Youk's relatives hail him as a humanitarian.

CNN: Kevorkian Case: Kevorkian trial set

His supporters hail him as a reformist moderate but his critics say he overreached his powers while in office.

BBC: Maldives ex-President Mohamed Nasheed defies court

Owners of yellow-taxi medallions saw allowing livery cabs to pick up street-hail passengers as a serious infringement on a right that would cost many of them hundreds of thousands of dollars.

WSJ: Deal Clears Way For New Taxi Class