哈哈，微观的问题。有一定得难度！！不好翻译，学习了

努力吧

试一下；
translation:
if the slope of budge line is steeper than the slope of indifference curve where they intersect, labors could maximize their utility by increasing working hours in order to obtain higher indifference curve, where the optimized utility would be reached when the slope of budge line is equivalent to the slope of the indifferent curve.