Sentence examples for have never been established from inspiring English sources

Peng also note that conditions suitable for elongated grain growth have never been established in such systems because of the lack of the formation and subsequent decomposition of intermediate phases during sintering.

Although similar studies investigating the role of cigarette exposure in susceptibility to SSc have been rarely reported and specific mechanisms have never been established, the relationship between smoking and some SSc-related symptoms have been demonstrated during the last decade.

Bernstein notes that Washington's motives have never been established.

Like thousands of other Guatemalans, his whereabouts after his abduction have never been established.

Abdulrahman's connections to threats against the United States, other than by being inferred through who his father was, have never been established.

This has previously been suggested [14] [19], [22] but, in contrast to cases of POF/POI [20], [21], PCO and/or PCOS have never been established as autoimmune in nature.

His identity has never been established.

But whether this relationship is causal has never been established".

The identity of those who fired the first shots has never been established.

It has never been established, however, that there is anything wrong with the solid, passive 5... c6.

And Lilly says that a clear connection between the drug and diabetes has never been established.