It expects sales in 2011 to rise by 4-5 per cent, which is more in line with historical rates.

它还预测，2011 年销售额将增长4-5%，这与历史增长率比较接近。

Conlangs may not have a stellar historical success rate, but they do a great job of revealing how we feel about language.

Conlangs 的历史成功率可能不高，但它们在揭示我们对语言的感受方面做得很好。

At historical rates, a portfolio that is evenly split between stocks and commodity futures would have a better return than a stock-only portfolio, and three-quarters of the volatility.

按照历史汇率， 股票和商品期货之间平均分配的投资组合将比纯股票投资组合获得更好的回报，并且波动性只有四分之三。