翻译一句话（翻译机就算了）

1我们要从众多不确定性因素中找出对投资项目经济效益指标有重要影响的因素,进行分析、测算
1 We should find some factors from various uncertain factors, which have important effect on the economical benefit target of investment project, and analyse and calculate them.

2 盈亏平衡点可以用销售量来表示，是指全部销售收入等于全部成本时 简单的说就是不亏本也不赚钱。
盈亏平衡点可以用销售额来表示，即盈亏平衡点的销售额。
还可以用销售数来衡量。
2.Break-even point (BEP)can be represented with sales volume, it means the point where the total sales income is equal to the total cost, i.e. no loss and no earnings.BEP can be represented with sales volume, which is the sales volume at the balance point between loss and earnings. Also it can be measured with sales quantity

We should find out these factors which have important effect on the economic indicators of the investment projects from various uncertainties, and do analysis and measurements.

Breakeven point can be represented by sales volume, this means all the sales revenues equal the total cost, simply saying, it's