U. S. troops tightened security around several key buildings in Baghdad Sunday, possibly in connection with Operation Desert Sidewinder.
美军星期天在巴格达几栋重要建筑物周围加强了安全戒备，可能同“沙漠响尾蛇行动”有关。
Local police tightened security on the highway so only a few people were able to volunteer on the spot. Many donated things on the Internet instead.
由于当地警方已经在高速功路进行了警戒，所以只有很小一部分志愿者能够进入现场，更多的捐赠行为则是在网上进行的。
But, as foreign oil giants such as Royal Dutch Shell and ExxonMobil have tightened security and shifted professional staff out of the Delta, attackers have started looking for softer targets.
但是当外国石油巨头，如皇家荷兰壳牌公司和埃克森美孚公司加强了保安措施，将专业人员迁移出尼日尔三角洲地区后，绑架者们开始搜寻更容易对付的目标。
Security tightened in the capital in readiness for the president's arrival.
首都的安全加强了,为总统的到来做好了准备。
A spokesman said the move was temporary while security at guesthouses was tightened.
一名发言人说，此次撤出行动是临时性的，旅馆的安全警戒更为严格。
Moscow police has tightened the security in the city's other airports and metro system.
莫斯科警方提高了机场和地铁安全警戒级别。
But many complain about the impact that stringent security precautions and tightened visa restrictions for foreigners have had on business.
但很多人也抱怨严格的安保和对外国人签证的限制会给商业带来很大影响。
Security has been tightened across Indonesia, with 500 troops put on standby to support police in the capital, Jakarta.
印尼全国的安全措施都有加强，有500多名军人进入待命状态，随时支援首都雅加达的警方。
We have tightened the security of our servers.
我们已经加强了我们的服务器安全。
We have tightened the security of our servers.
我们已经加强了我们的服务器安全。
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