Dozens of protesters even broke through a security fence.

数十名抗议者甚至冲破了安全围栏。

Scientists have set up two security fences at each of Assam state's breeding centers.

科学家们已经在阿萨姆邦的每个繁育中心设置了两个安全围栏。

In downtown Vancouver, some roads are already closed, and rings of security fencing surround some key venues.

在温哥华市中心，一些道路已经封闭，一些关键场所周围围起了安全围栏。

We built and renovated the security fence. Al-Nusra has been present there for about the past five months.

我们建造并更新了安全栅栏。努斯拉已经驻扎在那里五个月的时间。

Scientists have set up two security fences at each of Assam state's breeding centers. No visitors are permitted, and cars cannot be left at the centers.

科学家们已经在阿萨姆邦的每个繁殖中心设置了两道安全围栏。访客不得入内，车辆不得在中心逗留。

Greece began extending the security fence at its rugged border with Turkey last year, a decade after Athens initially built a 13-kilometer fence in the region to stem the tide of illegal migration.

希腊去年开始在与土耳其崎岖的边界上延长安全围栏，十年前，雅典曾在该地区修建了一处13公里长的围栏，以遏制非法移民的浪潮。