The association should be coherent; that is, plausible and explicable biologically according to known facts in the naturalhistory and biology of the disease.
相关性应是合理的；也就是说，根据疾病的自然史和生物学上的已知事实，可以从生物学角度来解释相关性。
2
With such a variety of factors, it is no wonder that scientists don't fully understand the naturalhistory of the disease.
纵观以上各种不同的因素，无怪科学家们还未完全弄清致病的天然历史。
3
First, from a patient's point of view, there are several useful findings about the naturalhistory of rotator cuff disease and the clinical course that asymptomatic rotator cuff tears follow.