1, 10% it means that if the market portfolio goes up 10% in value 10% then this asset also goes up 10% in value.

当β等于1时，If，β,表明若市场组合增值,该资产也同时增值。

耶鲁公开课 - 金融市场课程节选

is two, 10% it means that if the market goes up 10% in value, the stock tends to go up 20% in value and so on.

当β值等于2时，If，β,表明若市场组合增值，股票价值就增长了20%，以此类推。

耶鲁公开课 - 金融市场课程节选