一項又一項研究證實了

一項 yiˊ xiangˋ

(One item, One project, One thing) One item, One thing, One project

一項又一項 yiˊ xiangˋ youˋ yiˊ xiangˋ

(On item) On item after another

又一 youˋ yiˉ

(Another, Yet) Another, Yet another

一項研究 yiˊ xiangˋ yanˊ jiuˉ

(Research, Study) Study, A study, Research study, A research study

研究 yanˊ jiuˉ

(Research, Study, To research, To study) To study, To research, Study , Studies , Studying , Studied , Research , Researches , Researching , Researched

證實 zhengˋ shiˊ

(Confirm) Confirm

證實了 zhengˋ shiˊ le˙

(Proved) Proved