Definition: when something starts to happen or exist Level: C2
吸烟促进癌症的发展。
Smoking encourages the ___development of cancer.
新疾病的发展对全球健康构成威胁。
The ___development of new diseases poses a threat to global health.
技术的快速发展改变了我们的生活。
The rapid ___development of technology has changed our lives.
