化学武器的防御,防化 defence against chemical weapons 化学武器的宣布 declaration of chemical weapons ..
权威例句
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There is one less simple explanation: a reported disagreement within Israel's defence establishment over whether or not to ratify the new international convention againstchemicalweapons.
ECONOMIST: Israel
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On Monday, US Defence Secretary Chuck Hagel said on a visit to Israel that the use of chemicalweapons by Syria against its people would be a "game-changer".
BBC: Syria has used chemical weapons, Israeli military says