说不清道不明 meaning in English

it is not something that one can explain clearly and make people understand

When it comes to breast cancer , as with many diseases , there are few clear answers
正如替代疗法用于治疗许多疾病一样，它对乳腺癌疗效如何，对上述问题仍说不清道不明。
But you felt . the moment she entered . that something vital and strong and somehow indestructible had come in with her , although she moved slowly , and her voice was sweet and soft
但她一进门，我们就感到有一种说不清道不明充满活力和刚强的气氛，尽管她的步子慢悠声调甜柔。
In order to free his mind from this indistinctness and duplicity of impression , which vexed it with a strange disquietude , he recalled and more thoroughly defined the plans which hester and himself had sketched for their departure
为了摆脱那搅得他莫名其妙地心烦意乱的说不清道不明的印象，他回忆并更加彻底地澄清了一下他和海丝特为出走所安排的计划。