9 `% H1 l0 {, M+ z8 a , J% [8 [" U H1 y6 w5 T, P补充一点:原句I then gave a short tutorial on the manufaturing and operation of floppy disks andexplained why magnets and poking holes in the media storage meant certain death for their data. r1 g j/ C2 k$ M1 d1 u前面这个tutorial on的内容还蛮正式的,因为没有更多的上下文,不了解tutorial的对象是谁,但从内容上来看,可以当成一堂课来看了。4 W7 e* m$ e( c; d7 _