• The observation curves fall off steeply .
• The curve slopes ( or falls ) steeply down .
• The curve shows a steep decline .
• The observation curves fall off steeply .
• The curve slopes ( or falls ) steeply down .
• The curve shows a steep decline .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012