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Astronomers say they've made a major discovery of planets orbiting a distant start which may hold the right conditions to support life. They say they've found seven earth-sized planets orbiting a star called x I. They are believed to be the correct distance from the star for liquid water to exist on their surfaces.

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astronomer：[ə'strɒnəmə]

n. 天文学家

orbit：['ɔrbɪt]

n. 轨道；眼眶；势力范围；生活常规

vi. 盘旋；绕轨道运行

vt. 绕…轨道而行

Official figures from Mexico show that the number of murders increased by a third in January compared with the same month last year. The authorities suspect the jump in violence is linked to the extradition to the United States of the drug lord, x, known as x. They believe a power vacuum has encouraged attacks by rival criminal groups.

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extradition：[ekstrə'dɪʃ(ə)n]

n. 引渡；亡命者送还本国

vacuum：['vækjʊəm]

n. 真空；空间；真空吸尘器

adj. 真空的；利用真空的；产生真空的

vt. 用真空吸尘器清扫

The World Trade Organisation says a deal, which is described as the biggest reform of global trade in a generation has come into effect. The agreement, which aims to streamline cross-border trade, has now been ratified by the United States, the European Union and China.

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ratify：['rætɪfaɪ]

vt. 批准；认可

The centrist French presidential candidate, x, has accepted an offer of an alliance with a veteran campaigner, x, who could have split the vote if he stood against him. Mr. x said there was an urgent need to join forces in the face of challenge from the anti-immigration party, National Front.

The U.S. military has acknowledged that its troops have been involved in fighting with Islamic State militants in the battle for the Iraqi city of Mosul. When American forces were first deployed to Iraq, they were meant only to advise local allies. But they are working more closely with the Iraqi Army.

Demonstrators opposed to the building of an oil pipeline under a lake in North Dakota in the United States have sent fire to tents in their protest camp, shortly before a deadline to leave expires today. President Trump has signed a executive order, clearing the way for the contruction of the Dakona Access Pipeline to proceed.

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expire：[ɪk'spaɪə; ek-]

vi. 期满；终止；死亡；呼气

vt. 呼出（空气）