发现PCB比原理图少两个元件，该如何找到这两个元件
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Total components with Footprints changed = 3
Total components with Comments changed = 0
Total extra components = 0
Total missing components = 2
Total nets with names changed = 0
Total nets with missing/extra pins = 0
Total extra nets in Exported 300C = 0
Total extra nets in 原理图 = 0
Total nets in Exported 300C = 275
Total nets in 原理图 = 275
Total components in Exported 300C = 331
Total components in 原理图 = 333
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