• As development progresses ( or continues ) [ or In the course ( or process ) of development] the acanthella becomes elongate.
• This proportion gradually increased with development .
• As development progresses ( or continues ) [ or In the course ( or process ) of development] the acanthella becomes elongate.
• This proportion gradually increased with development .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012