First up, an international increase in security. There are more visible police in airports across the U.S., train stations and tunnels, places where masses of people gather and travel. They`re all in a state of heightened alert.

首先，加强国际安全。美国，机场和火车站以及隧道，在人民聚集和旅游的地方，警察数量增加。

In several cities around the world, even where officials say there are no specific threats at this time, more security forces are on guard, following Wednesday`s terrorist attacks in the Belgium capital of Brussels. Thirty- one people were killed and 270 wounded when an airport and train station were targeted. ISIS said it was responsible.

周三，比利时首都布鲁塞尔发生连环爆炸，之后，世界数个城市，安全部队在加强警卫，官员称目前暂时没有具体的威胁。比利时机场和火车发生爆炸导致31人死亡，270人受伤。IS称为此事件负责。

Belgian police say there were four attackers in all. Two of them were brothers who died. One of the suicide bombers hasn`t been identified yet and another suspected terrorist is on the run after placing a bomb at the Brussels airport that they did not go off.

比利时警方称为总共有四名袭击者。其中两人是兄弟，这两人已经死亡。另外一名自杀式袭击者身份尚未确认，最后一名可疑恐怖分子还在逃亡。这两人在布鲁塞尔机场放置炸弹后，并没有立即离开。

Police raids continue throughout Brussels, which is under its highest threat warning.

警察仍在布鲁塞尔搜寻，布鲁塞尔仍处于最高警备状态、

First up, an international increase in security. There are more visible police in airports across the U.S., train stations and tunnels, places where masses of people gather and travel. They`re all in a state of heightened alert.

In several cities around the world, even where officials say there are no specific threats at this time, more security forces are on guard, following Wednesday`s terrorist attacks in the Belgium capital of Brussels. Thirty- one people were killed and 270 wounded when an airport and train station were targeted. ISIS said it was responsible.

Belgian police say there were four attackers in all. Two of them were brothers who died. One of the suicide bombers hasn`t been identified yet and another suspected terrorist is on the run after placing a bomb at the Brussels airport that they did not go off.

Police raids continue throughout Brussels, which is under its highest threat warning.