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短语讲解：

1. The group's leader Hassan Nasrallah said the new arms would been supplied in response to recent Israeli air strikes against what it believes to be covert arms shipments from Syria to Hezbollah.

in response to 对…做出反应
例句：He quitted smoking in response to her appeal.
为响应她的呼吁，他戒烟了。

2. Prosecutors say the man, Ahmed Abassi, arranged a meeting in New York with a fellow suspect Chiheb Esseghaier who was recently arrested in Canada in connection with a plot to derail a train.

in connection with 与…有关，连同
例句：That is a problem in connection with the military affairs. 
那是一个和军事有关的问题。 

3. Violence has marred the campaign train with more than 100 deaths.

more than 不只是；很
例句：We have more than a car!
我们可不止有辆车！

4. Officials say tens of thousands of troops will be deployed at polling stations on Saturday after the Taliban threatened to carry out suicide attacks.

tens of thousands of 千百万；千千万万；成千上万
例句：We are going to hire tens of thousands of people.
我们将要招聘数万人。
carry out 执行；进行
例句：We must carry out it wholeheartedly indeed.
我们必须尽力把它贯彻到底。