Sound strange to us may be rendered as “we have never heard this before,” “these are completely new to us,” or “these are very different from what we have heard before.”
Quoted with permission from Newman, Barclay M. and Nida, Eugene A. A Handbook on The Acts of the Apostles. (UBS Handbook Series). New York: UBS, 1972. For this and other handbooks for translators see here .