Security has been stepped up across France in the wake of the attack, with Paris placed on the highest alert level.

袭击发生后法国各地已加强了安保措施，其中巴黎的安保警戒提至级别。

That is what the police are on high alert for now.

这就是警方目前处度警戒状态的原因。

I suggest we establish basic protection around the place, then gather our students and meet in the Great Hall.

“我建议在学校周围设立基本的警戒，然后把学生都召集起来，在大礼堂会合。

After a week of record rises here in France in terms of the number of new coronavirus cases, two extra cities on top of the four that entered the maximum alert category on Saturday will do so from tomorrow.

一周以来，法国的新增新冠感染病例创历史新，除了在周六进警戒级别的四个城市外，还有两个城市将从明天开始加。

France remains on its highest level of security alert as the search continues for a gunman who shot dead two people near a Christmas market in Strasbourg on Tuesday.

法国仍处级别的安全警戒状态，同时也在继续搜寻一名枪手，周二他在斯特拉斯堡的一节市场附近枪杀了两人。

But it is very alarming at the rate we are going and although people will say, in the long run we are going to stabilise.

但是现在人口增长速度已经达到了令人警戒的地步了，虽然人们说，长期来看，人口数量会趋稳定。

Animals that pair visual warnings with other defenses are called aposematic.

将视觉警戒和其他防御一起使用的动物是具有警戒色的动物。

On November 18, it raised the alert level on White Island from 1 to 2.

11月18日，该机构将怀特岛的警戒级别从1级提到2级。

Did what I wanted. It lowered his guard.

也算达成目的了，降低了他的警戒。

The red line we are talking about today involves Syria.

今天我们正在谈论的警戒线涉及叙利亚。

Many of the park staff have cautionary tales about buffalo.

园区很多工作人员都有和水牛有关的警戒故事。

And the researchers say that this constant state of high alert may be why bats can carry Ebola, Nipah virus, and a whole lot of other infections with no symptoms at all.

而研究人员称这种持续的警戒状态可能是蝙蝠携带埃博拉病毒、尼帕病毒及其它感染性疾病但却没有出现任何症状的原因。

COVID infections are up above 250 per a hundred thousand people, which means the cities hit a higher alert level and automatically new measures are going to kick in.

每10万人中感染新冠肺炎的人数超过250人，这意味着这些城市进了更的警戒级别，新措施将自动生效。

Above the clouds! -not only no rain, no mist, no dew, but a scorching sun, and an air, both by day and by night, dry to almost an alarming degree.

“云层之上”——不仅仅没有雨、雾、水珠，而且有极热的太阳和大气，二者日日夜夜地干燥到警戒线的程度。

Philippine officials have raised the alert level for one of the country's most active volcanoes after superheated streams of gas, debris and rocks cascaded down its upper slope.

菲律宾官员提了该国活跃火山之一的警戒级别，此前过热的气体、碎片和岩石流沿着其上斜坡倾泻而下。

A day after the shooting rampage that claimed seven lives and left dozens wounded, several cordon blocks of the town center appeared frozen in time.

枪击事件造成7人死亡，数十人受伤，一天后，市中心的几个警戒线街区似乎在时间上冻结了。

The volcano, David, went from Level 1 alert to Level 4 in just a matter of hours Sunday, and today, it continues to creep up.

大卫，在周日喷发后的几个小时内，塔尔火山的警戒级别就从1级升至4级，今天，警戒级别继续提升。

Earlier, Liberia lifted a quarantine cordon on a large slum it sealed off more than a week ago to contain the spread of the virus.

早些时候，利比里亚撤销了一周多以前为了控制病毒蔓延而封锁的一个大型贫民窟的隔离警戒线。

On November 18, it raised the alert level on White Island from 1 to 2. A level of 5 represents a major eruption.

11月18日，怀特岛的警戒级别从1级提到2级。5级代表大规模火山喷发。

The warning levels for cyclones are different all over the world but here in Australia, we have five categories determined by wind speed.

世界各地旋风的警戒级别各不相同，但澳大利亚根据风速将其分为五类。