慢速英语:An International Coalition Calls for Ban on Autonomous Weapons

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短语讲解：

1. He says the world should oppose the weapons system that would be able to identify and attack targets mechanically.

be able to v.能，会; 能够
例句：You should be able to converse comfortably.
你应该能够舒服地进行谈话。

2. If and when a killer robot commits a war crime, violates international humanitarian law...who would be held accountable, who would be responsible for that violation?

be responsible for 为…负责，形成…的原因; 主管
例句：You should be responsible for all the copnsequences. 
你应当为这一切后果承担责任。 

3. He adds that in recent months, fully autonomous weapons have gone from a little known issue to one that is commanding worldwide attention.

a little 少量地，稍许地
例句：We need a little more time.
我们还需要一点时间。

4. He says that since last May, 34 countries have openly expressed concern about the dangers the weapons present.

concern about 使（自己）关心…
例句：Public concern about environmental pollution is mounting.
公众对环境污染的担忧在不断加剧。