The message purported to set out a plot to attack a naval base, apparently Mayport in Jacksonville, Florida, with the aim of achieving the “complete destruction” of the USS John F.
这条信息谣传要发动一次袭击美海军基地，显然他的目标是在佛罗里达，杰克逊威尔的梅港。
A higher number of deepened periodontal pockets (infection of the gum around the base of the tooth) had a 53 percent increased risk of heart attack compared to those with the fewest pockets.
牙周袋（牙根周围牙龈感染）多的比牙周袋最少的心脏病风险高53%；
Basketball moving skills, the base of attack and defense technics, refer to students' step-moving in the match to change location, direction, speed, and gaining height.
篮球移动技术是比赛中学生为了改变位置、方向、速度和争取高度而采取的各种脚步动作，是完成进攻和防守技术的基础。
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
Experts in Pakistan believe the involvement of the local Taliban in the attack on a CIA base in Afghanistan could mean more pressure on Islamabad to intensify its crackdown on militants to secure the border areas.
VOA: standard.2010.01.09
Conscious that a faraway and costly war doesn't play well with voters, incumbent Gordon Brown insists the troops are fighting to keep Britain safe "We have got to be clear that we cannot allow terrorists to have territory in the world that then they use as a base to attack the United Kingdom."
VOA: standard.2010.04.30
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