значительное изменение
• The wood has been subjected to pronounced (or drastic, or considerable, or substantial) humidity changes.
• Wide temperature changes (or variations).
Русско-английский научно-технический словарь• The wood has been subjected to pronounced (or drastic, or considerable, or substantial) humidity changes.
• Wide temperature changes (or variations).
Русско-английский научно-технический словарь