n.惡化；退化；變壞
The deterioration of soil structure is difficult to remedy. 土壤結(jié)構(gòu)的惡化很難挽回。
I definitely felt a deterioration in vigor. 我自感體力已退化了。
The food undergoes no deterioration in the tropics. 這種食品在熱帶地方不會變質(zhì)。
生物變質(zhì)
