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短语讲解：

1. Western leaders have stepped up pressure on Russia to abandon efforts to annex Ukraine's Crimea region or face sanctions.

step up 走上; （使）增加
例句：It plans to step up its protests.
他们计划加紧他们的抗议活动。

2. “We will continue to say to the Russian government that if it continues on the path that it is on, then not only us, but the international community, the European Union and others will be forced to apply a cost to Russia's violations of international law.”

not only ... but 不但...而且
例句：I began to feel myself not only solitary but helpless.
我开始觉得自己不仅是孤独的而且是无助的.

3. Earlier, the European Union and the G7 group of industrialized nations both said that they would take action against Russia if the referendum went ahead.

take action 采取行动，行动起来
例句：Take action on your resource inventory.
在资源发掘中采取行动。

4. The American Secretary of State John Kerry will meet his Russian counterpart Sergei Lavrov in London on Friday to present a series of options for resolving the crisis.

a series of 一系列; 一连串
例句：We have won a series of victories.
我们取得了一个又一个的胜利。

5. Dozens of rockets could be seen being fired from the southern outskirts of Gaza city according to an eyewitness.

according to 根据，按照
例句：They expanded according to need.
他们根据实际适时扩大规模。

6. The militant group Islamic Jihad said it carried out the attack in response to an Israeli raid on Tuesday which killed three of its fighters.

in response to 对…做出反应
例句：Third, many emerging economies have tightened monetary policy in response to high inflation.
第三，许多新兴经济体推行货币紧缩政策是为了应对高通胀。

7. At least 22 people from both sides of the political divide have been killed in the unrest.

at least 至少
例句：Read at least 30 books.
至少读30本书。

8. Two women died, and a number of people are unaccounted for following the blast.

a number of 许多的; 一些
例句：A number of foreign governments condemned the army coup.
一些外国政府谴责马里发生的军事政变。