化学战

例句：

1. 1. The use of chemical weapons in war has been a subject of international concern.
   在战争中使用化学武器引起了国际关注。
2. 2. The recent outbreak of chemical warfare in Syria has raised ethical questions about the use of such weapons.
   叙利亚近期爆发的化学战引发了对此类武器使用的伦理问题。
3. 3. The chemical warfare used by the enemy was highly toxic and had devastating effects on civilians.
   敌人使用的化学战剂具有极高的毒性，对平民造成了毁灭性的打击。