The ecologist is concerned primarily with the quantities of matter and energy that pass through a given ecosystem, and with the rates at which they do so.

生态学家主要关注的是流经某一生态系统的物质和能量的量以及它们的速度。

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He puzzled over the matter some time, and finally decided that some witch had interfered and broken the charm.

他对这件事琢磨了半天，最后断定是某个妖魔干扰并打破了魔咒。

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The fact of the matter is that rock and roll, which was invented within the lifetime of many of us.

事实上，摇滚流行乐是在我们许多人的有生之年发明的。

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They have a center,and arms of matter that seem to circle the center like a pinwheel.

VOA: special.2009.04.29

And the fact of the matter is that rock and roll, which was invented within the lifetime of many of us.

事实上，我们很多人，见证了摇滚的诞生和发展。

普林斯顿公开课 - 人性课程节选

He understood the interaction of particles of matter, and that's important to set the stage for the Rutherford experiment in Manchester about 10 years later.

他理解物质粒子之间的相互作用，这点很重要,对于10年后他在曼彻斯特搭设,用于卢瑟福实验的平台来说。

麻省理工公开课 - 固态化学导论课程节选

In a statement on West Ham's website, the club said Boa Morte had called Sullivan on Monday to apologise for his comments, and that the matter was now resolved.

BBC: Gianfranco Zola to discuss West Ham future with owners

Iran's state-run media reported that Iranian security forces arrested the three Americans on Friday on charges of illegally entering the country from Iraq's Kurdistan region and that the matter is under investigation.

CNN: Clinton presses Iran for info on detained U.S. hikers

He testified Wednesday to the House Judiciary Committee that he could not comment on the matter because he had recused himself from the case to avoid any appearance of conflict of interest and that the matter was being handled by a deputy.

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