1. The scientist is researching the development of a counteractant to neutralize the effects of the toxic substance.（这位科学家正在研究开发一种对抗剂，以中和有毒物质的影响。）
2. The use of counteractants can help minimize the damage caused by certain chemicals.（使用对抗剂可以帮助减少某些化学物质造成的损害。）