For the study to be complete, researchers need at least 21 cases to make a final declaration of effectiveness.

为了完成这项研究，研究人员至少需要21例病例才能做出最终的有效性声明。

The ministers debated for days about how to word their final declaration.

部长们就如何措辞他们的最终宣言争论了好几天。

With the final declaration on its role in the 21 century, the summit's statement is expected to call on UN members to make commitments to eradicate poverty, promote democracy and education and reverse the spread of AIDS.

随着关于其在 21 世纪的作用的最终宣言，峰会的声明预计将呼吁联合国成员国做出消除贫困、促进民主和教育以及扭转艾滋病蔓延的承诺。