自从开展活动以来 Since undertaking activities since ; Since its activities ; Since the activities since the
但是自2005年阿巴斯因提出与以色列达成协商和平而胜选以来，这个组织在很大程度上没有开展什么活动。
But the group has been largely inactive since 2005, when Mr. Abbas was elected on a platform of reaching a negotiated peace with Israel.
毗邻的蒙古也是一样，自1991年开展全国计划免疫活动以来，对儿童的乙肝流行率进行了调查，早期结果显示出积极迹象。
Similarly in neighbouring Mongolia, early results of surveys on hepatitis B prevalence among children are showing positive results since a national immunization campaign began in 1991.
北京自1994年开展竞争情报活动以来，已为8家大型企业成功地导入竞争情报。
Since 1994, there have been 8 large enterprises which have developed their own competitive intelligence systems in Beijing.
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