What is the difference between derivation and inflection?Ill

derivation:[ deri'veiʃən ]
n.引出,诱导,来历
Examples:
1.A line of descent; derivation.
血缘鉴定血统的联系；来历
2.Place of origin; derivation.
起源起源的地方；出处
3.Taxpayer:what do you mean by the method of derivation?
纳税人：什么是以支出换算收入?
inflection:[ in'flekʃən ]
n.屈曲,变调,音调变化
Examples:
1.The violin has a poor inflection.
这把小提琴的音调不准.
2.In English,some questions have a rising inflection.
在英语中有些疑问句需要用升调.
3.A falling inflection of the voice,as at the end of a sentence.
声音降落,降句调发音时下降的音调
4.In certain languages,the inflection of nouns,pronouns,and adjectives in categories such as case,number,and gender.
词形变化某些语言中,名词,代词和形容词在格,数和性等方面的词形变化