新疫苗可能预防某些癌症的发展。

New vaccines may prevent the ___development of some cancers.

癌症和艾滋病的发展构成的威胁是重大的。

The threat posed by the ___development of cancer and AIDS is significant.

技术的快速发展已经改变了我们的日常生活。

The rapid ___development of technology has transformed our daily lives.