????????????,????????????,????????1??10
????????1??10???????????????
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????1??2?????10??????????
????2??3?????40??????????
????3??4?????100??????????
????4??5?????300??????????
????5??6?????520??????????
????6??7?????1000??????????
????7??8?????1800??????????
????8??9?????3300??????????
????9??10?????6100??????????
????????????????40407??????????http://www.audiogearreviews.com/wsh/