慢速英语:South Korea Have Linked North Korea to Recent Attacks on Computers

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1. North Korea is often seen as a poor country, cut off from the world and technologically out of date.

cut off vt.切除
例句：All bail-out funds would be cut off.
所有的救济资金将被切断。

2. But officials in South Korea have linked North Korea to recent attacks on computers and computer information systems, and they described the North's ability to carry out such attacks as world class.

carry out 执行; 进行
例句：They should also carry out some fundamental reforms.
这些政府也应该执行一些基础性的改革。

3. North Korea is believed responsible for attacks earlier this year that affected tens of thousands of computers.

tens of thousands of 千百万; 千千万万
例句：These companies employ tens of thousands of americans in nearly 40 states.
这些公司在近40个州雇佣了数万名美国人。