He notes,however, that such purchases are impossible to do if the Kremlin continues to envision a conflict with the West.

VOA: standard.2009.03.20

Linking up singers across the Atlantic, however, is impossible, due to the speed of electromagnetic radiation.

CNN: Musicians aim to create virtual choir

However it is impossible to guess whether such efforts will pull Michigan out of the mire.

ECONOMIST: Michigan

Quite how many, however, is impossible to tell: because most such treatments are still unregulated, no one knows how many people are either providing or receiving them.

ECONOMIST: Health