青云翻译

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You can start to sell at high prices, after a period of time, to sell at low prices so that you can earn income

You might just start by the high price sell, after period of time, by low price sell, you could layer upon layer obtain the income

You can sell in the beginning, a higher price after a period of time, sold at a low price, so much so that you can obtain an income layers

You can start to sell at high prices, after a period of time, to sell at low prices so that you can earn income