Hyun says social instability has increased in North Korea, so leader Kim Jong-il needs to continue to reinforce his domestic power base.

VOA: standard.2009.06.22

I need a so-called base case even in my analysis here.

在分析过程中我需要一个所谓的基本条件。

哈佛公开课 - 计算机科学课程节选

Then in September, two explosive-laden vehicles penetrated the base of the African Union peacekeeping mission in Somalia,known as AMISOM, resulting in the death of 17 peacekeepers.

VOA: standard.2009.12.05

Residents in Mogadishu say hundreds of Islamist insurgents, led by al-Shabab, fired weapons and mortars at an African Union base in the south of the city.

VOA: standard.2009.08.21

The stated goal of the Afghan conflict is to deny the Taliban and its al-Qaida allies a home base from which to attack targets in the West.

VOA: standard.2009.09.09

Bereket told reporters, pro-government Somali militias have permission to use Ethiopia as a base of operations in attacking al-Shabab rebels, who control large sections of southern Somalia.

VOA: standard.2009.08.20

The man in the newly released video , is identified as Humam Khalil Abu-Mulal al-Balawi, who blew himself up inside a key U.S base in an eastern Afghan region bordering Pakistan.

VOA: standard.2010.01.09

Peter Pham, Associate Professor of Justice Studies, Political Science and Africana Studies at James Madison University, says conditions in Somalia threaten security and stability of the Horn of Africa: "Even without toppling the TFG, al-Shabaab has already achieved a major objective by securing a territorial base from which like-minded militants and terrorists can carry out attacks elsewhere, especially against targets in the Arabian Peninsula as well as participating in the current violence against Somalis,".

VOA: standard.2009.06.26