noun 下载 🔗分享 生物炭,炭肥 Charcoal that is used as a nutritional supplement for soil. Examples : "The gardener mixed biochar into the soil to help the vegetables grow bigger and healthier. " 园丁把生物炭,也就是炭肥混入土壤,以帮助蔬菜长得更大更健康。 agriculture material environment science plant fuel 与AI对话词汇游戏阅读练习