[00:00.00] 作词 : Macfadden[00:00.00]Lesson 6:The Lecture -Jurassic 5[00:01.138]OK let's begin[00:04.638]Compound:A substance composed of two or more elements chemically combined in definite proportions by weight[00:10.898]Mixture:Two or more substances that are not chemically united such as air[00:15.78]Solution:A uniform mixture of varying proportions of a solvent and a solute[00:24.908]For many of our students this is the lesson you've been waiting for[00:28.648]Lesson Six[00:38.18]Left channel[00:41.638]Right channel[00:45.758]Hydrogen H 1[00:47.938]Sodium Na 1[00:49.878]Magnesium Mg 2[00:52.368]Aluminum Al 3[00:54.298]Potassium K 1[00:56.488]Calcium Ca 2[00:58.668]Chromium Cr 2three six[01:29.428]Any physical difficulty with a record or a turntable is taken care of[01:44.288]Do you think that Led Zeppelin and Frank Sinatra would go together[01:48.788]No[01:50.598]Combinations of music[02:08.318]You're about to play a sole 45RPM recording[02:11.998]But the turntable is set at 33and 1/3[02:14.688]And the record plays very slowly[02:23.478]Let's pick up the tempo a bit eh[02:37.858]Now let us imagine you are in the middle of your Disk Jockey program[02:48.858]This is the mark of a professional[02:59.778]Yeah if you could throw a couple yeah uhuh[03:02.468]Right when he's playin'the drum[03:03.538]Let him play a couple'beats alone[03:05.468]Eeeeuuh[03:16.18]Uh[03:46.48]Oh I'm sorry I had the turntable at the wrong speed[04:13.270]Listen[04:18.770]Scratching --The greatest thing on earth[04:31.288]What do you do[04:33.198]What do you do[04:46.348]Drop[04:56.708]Chemical change:a change that alters the composition of the