名詞 modification:

1. the act of making something different (as e.g. the size of a garment)
   同義詞：alteration, adjustment
2. slightly modified copy; not an exact copy
3. the grammatical relation that exists when a word qualifies the meaning of the phrase
   同義詞：qualifying, limiting
4. an event that occurs when something passes from one state or phase to another
   同義詞：change, alteration

1. Automatic modification of the index register.
   自動修改變址寄存器內(nèi)容。
2. Persistent modification of behavior resulting from an animal's experience.
   行為的修正由動物過去的經(jīng)歷導(dǎo)致的保持終生的行為修正

mod.i.fi.ca.tion

n.Abbr. modif.（名詞）縮寫 modif.
The act of modifying or the condition of being modified.
限制：限制的行動或被限制的條件
A result of modifying.
限制的結(jié)果
A small alteration, adjustment, or limitation.
更改：小小的改變，調(diào)正或限制
Biology Any of the changes in an organism caused by environment or activity and not genetically transmissable to offspring.
【生物學(xué)】 誘發(fā)變異：由環(huán)境或行為引起的但不遺傳給后代的有機(jī)物的變化
Linguistics
【語言學(xué)】
A change undergone by a word that is borrowed from another language.
外來語演變：由另一種語言借入的一個(gè)詞所經(jīng)歷的變化
A phonological change undergone by a word or morpheme when it is used in a construction, as the change ofwill to `ll in they`ll.
變異：一個(gè)字詞或語素當(dāng)被用在一個(gè)結(jié)構(gòu)中，如在they`ll 中，由 will 變成 `ll 時(shí)發(fā)生的語音變化

【引伸】
mod.ifica.tor
n.（名詞）
mod.ifica.tory