Almost all projects of this kind fall apart within a decade because too many people drop out of the study, or funding for the research dries up, or the researchers get distracted, or they die, and nobody moves the ball further down the field.
像这样的项目几乎都会在10年内终止， 因为有许多人会中途退出， 或者是研究资金不足， 或者是研究者转换方向， 或者去世，然后项目无人接手。