The country stepped up internal security.

该国加强了国内安全防卫。

《柯林斯英汉双解大词典》

She stepped up to receive her prize.

她走上前去领奖。

《牛津词典》

He has stepped up his training to prepare for the race.

他为准备那场比赛加强了训练。

《牛津词典》

McCain said the United States, France,Britain and Germany should not wait for the United Nations before imposing their own stepped-up sanctions regime.

VOA: standard.2010.04.14

Arab League Secretary General Amr Moussa stepped up mediation efforts to end the conflict, after arriving in the Yemeni capital Sanaa, for a three-day visit,Tuesday.

VOA: standard.2009.10.11

World Health Organization Director-General Margaret Chan said the alert level was stepped up because influenza viruses are unpredictable and can spread quickly around the world.

VOA: standard.2009.04.29

Stepped-up regulation of social networking is seen as a particular threat to India's Web growth.

WSJ: Facebook, Google to Stand Trial in India

Most importantly, the tragedy energized the growing majority of Americans who support stepped-up gun control.

CNN: 2013: America on the cusp of social change

But the State Department's most recent report on terrorism did make note of Sudan's stepped-up cooperation.

NPR: U.S. Relationship with Sudan a Balancing Act