chem·i·cal war·fare
noun/ˌkemɪkl ˈwɔːfeə(r)/
/ˌkemɪkl ˈwɔːrfer/
[uncountable]- the use of poisonous gases and chemicals as weapons in a war
化学战 - biological and chemical warfare
生物和化学战 - He denied his country has developed the capability for chemical warfare.
他否认他的国家已经有能力打化学战。
- biological and chemical warfare