Sentence examples for source remains unknown from inspiring English sources

The source remains unknown and many dissidents in China appear to have learned of the message via questioning by police.

In the case of the manganite and pyrolusite, the mineral's origin source remains unknown, but they could come from the same source, as it is common that manganite transforms itself in pyrolusite [35, 36].

This contaminant type was not found among current and past laboratory personnel and its exact source remains unknown.

Previous work on the human auditory cortex has revealed areas specialized in spatial processing but how the neurons in these areas represent the location of a sound source remains unknown.

PHM and PAL activity is present in mammalian serum, although the tissue source remains unknown.

It is thought to have been introduced relatively recently into koala populations by interspecies transmission [ 24] although the source remains unknown.

The Pärnu Gypsies' ultimate fate, due to scarcity of evidential sources, remains unknown.

While the capacity of GMAC for correlated sources remains unknown, these results clearly demonstrate that the proposed codes are able to outperform separate source and channel coding for GMAC (with separate source and channel coding, a good DSC would render the two sources nearly independent).

However, the effect of repeated exposure, generation after generation, to constant or alternative food sources remains unknown.

Its origin remains unknown.

While other candidates have been suggested (camels, for instance), the animal source of Mers remains unknown.