introduction和instruction的区别是什么?

*** introduction...介绍 (n) introduce (V)
The introduction of Western thought has influenced Chinese
society deeply.(N)
I introduced you to Peter.(V)
*** instruction (名词 noun)
教学,讲授;教育[U][(+in)]
She gives instruction in mathematics.
她讲授数学.
教诲;教导
命令,指示[P1][+to-v][+(that)]
They had carried out my instructions to the letter.
他们严格地按我的指示把事办了.
用法说明;操作指南[P]
I read the instructions on the bottle.
我读了瓶子上的用法说明.

instruction说明
I've read the instructions on the bottle.
我已经读了瓶子上的用法说明。
introduction介绍
brief introduction自我简介