All four show distinctive lava channels and other flow features similar to those found on shield volcanoes on Earth.

这四个地方都有独特的熔岩通道和其他类似地球上盾状火山的流动特征。

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Four American teenagers, all children of U.S. military personnel, have been arrested on charges of attempted murder, Japanese police said.

日本警方说，四名美国青少年因被控谋杀未遂而被捕，他们都是美国军人的孩子。

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When a lion tamer holds a chair in front of the lion's face, the lion tries to focus on all four legs of the chair at the same time.

当驯兽师举起一把椅子在狮子面前时，它会试着把注意力同时放在椅子的四条腿上。

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Having been pipped to the all-around title (which takes into account performances on all four pieces of apparatus) by team-mate Nastia Liukin, Johnson exacted revenge on the balance beam, the final women's gymnastics event of the Beijing Games.

BBC: US gymnast Shawn Johnson seeks focus to succeed in 2012

Warner Brothers, owned by Time Warner, the parent company of CNN, snapped up film rights on all four books -- as well as an option on the next three -- and the first Harry Potter movie became one of the most talked about projects in Hollywood.

CNN: British child actor 'a splendid Harry Potter'

We call on all four- and two-year institutions to join in this effort and implement the policies and strategies called for in the AAU Initiative: widespread adoption of the best teaching practices, attention to educational outcomes, and establishment of incentive systems that recognize and reward contributions to educational improvement.

WHITEHOUSE: Office of Science and Technology Policy Blog