我买了把吉他,说明书都是全英文的。对于吉他构造,我有几个不清楚。1,pickup selector switch 2, up-rhythm 3, middle-both 4,down-treble 5, neck pickup 6, bridge pickup 7, bridge pickup volume, 8, neck pickup volume 9, bridge pickup tone, 10,neck pickup tone. 上面10个怎么翻译啊。。。。。。