• A crucially ( or radically , or fundamentally ) new physical situation then arose in the deep interior of the primordial Sun.
• We must create radically ( or fundamentally ) new technology.
• A crucially ( or radically , or fundamentally ) new physical situation then arose in the deep interior of the primordial Sun.
• We must create radically ( or fundamentally ) new technology.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012