不得而知

But it remains unclear about the detail of the causal relation in between.

但其如何影响人类肿瘤的发展则不得而知。

Unknown. It is these two kinds of conjectural fountainhead only, it is jackals from the same lair however.

不得而知。只是这两种推测的源头，却都是一丘之貉。

Anything from cosmic rays to radiation to diet may activate a dormant oncogene, but how remains unknown.

任何东西，从宇宙射线到辐射，以至日常饮食，都可能激活潜伏的致癌基因，但如何激活的，仍然不得而知。

Anything from cosmic rays to radiation to diet may activate a dormant oncogene,but how remains unknown.

从宇宙射线到辐射到食物，任何东西都有可能激活沉睡中的致癌基因，但激活的方式尚不得而知。

Should not be allowed … to sell them at cut-rate prices without getting permission first from the jeans maker.

"意思是"只有事先经过牛仔裤生产商的同意才能打折销售。是否只有生产商才能决定价格，我们不得而知。

Inheritance tax the product which unifies as the death and the tax revenue whether avoids, we are unknown.

遗产税作为死亡与税收相结合的产物能否避免，我们不得而知。

They said it was not clear whether it was the degree of symmetry itself, or an associated characteristic such as co-ordination, or the abilities needed to perform a complicated dance move - or better rhythm, was the key.

他们说，究竟是因为平衡性本身，还是与身体平衡相关的协调性，还是演绎复杂舞步的能力，或是良好的节奏感，现在还不得而知。

There may be room for expansion, but the fertility of the lands is questionable, and the thick forests may tactically prove disasterous to the wide open type of combat your horsemen prefer.

这里或许是你扩张的地方，但是这片土地的肥沃与否不得而知，更何况这里浓密的森林对于适宜在开阔地形上作战的骑兵来说简直就是灾难。

For all migration's excellent effects, it is now—says Jean-Christophe Dumont of the OECD—"less than clear what potential migration has for poverty relief" in future.

虽然移民产生了积极的效果，但现在——经合组织的让·克里斯托弗·杜蒙表示——未来"移民对消除贫困有何作用仍不得而知。"

How this interview affected John's disciples, we do not know; but we do know the encomium it occasioned of John from the lips of Jesus: And when the messengers of John were departed, he began to speak to the multitudes concerning John. What went ye out into the desert to see?

这次见面如何影响约翰的门徒，我们不得而知；但我们知道出自耶稣之口的赞美约翰的话；"约翰所差来的人既走了，耶稣就对众人讲论约翰说："你们从前出去到旷野，是要看什么呢？

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。