不太明白这个问题，能说详细点么

比如说一个生产要素的需求价格弹性越高，这个生产要素的替代品就越多,我正在看英文微观经济学，有着几句话不太明白，希望大家能给翻译一下。

1,the price elasticity of demand for an input is larger the closer and the greater are the number of available substitutes for the input.

2, the price elasticity of demand for an input, say aluminum, is greater the larger is the price elasticity of supply of other inputs for which aluminum is a very good substitute in production.

3, since the demand for an input is derived from the demand for the final commodity produced with the input,the price elasticity of demand for an input is greater the larger is the price elasticity of demand of the commodity.

4, the price elasticity of demand for an input is lower the smaller is the percentage of the total cost spend on the input.

5, the price elasticity of an input is greater the longer the period of time allowed for the adjustment to the change in the input price.

这些是书上的原话，看了半天不太大明白，希望大家能帮忙解释一下，谢谢了 

1,the price elasticity of demand for an input is larger the closer and the greater are the number of available substitutes for the input.

一种要素的替代品数量越多、替代品越近似，其需求价格弹性越大。

2, the price elasticity of demand for an input, say aluminum, is greater the larger is the price elasticity of supply of other inputs for which aluminum is a very good substitute in production.

当能被某要素（如铝）很好替代的其他要素的供给价格弹性越大时，铝的需求价格弹性就会越大

3, since the demand for an input is derived from the demand for the final commodity produced with the input,the price elasticity of demand for an input is greater the larger is the price elasticity of demand of the commodity.

由于要素的需求是从最终产品（由要素生产的）的需求中派生出来的，要素的需求价格弹性相对产品的需求价格弹性更大。

4, the price elasticity of demand for an input is lower the smaller is the percentage of the total cost spend on the input.

要素在总要素中所占的费用越小，该要素的需求价格弹性越小。

5, the price elasticity of an input is greater the longer the period of time allowed for the adjustment to the change in the input price.

对要素价格改变的反应/调整时间越长，要素弹性越大。

瞎写的，可能有错误，欢迎指正~~