求翻译：当实际产量未达到一定限度时，边际成本随产量的扩大而递减；当产量超过一定限度时，边际成本随产量的扩大而递增。因为，当产量超过一定限度时，总固定成本就会递增。由此可见影响边际成本的重要因素就是产量超过一定限度（生产能力）后的不断扩大所导致的总固定费用的阶段性增加。是什么意思？

When the actual output has not reached a certain limit, the marginal costs decrease with the expansion of production; when production exceeds a certain limit, the marginal costs increase with the expansion of production. Because, when the output exceeds a certain limit, the total fixed costs will in

When the actual production does not meet a certain limit, and the marginal cost of production is decreasing; when production expansion over a certain limit, marginal cost of production expansion, incremental. Because, when output exceeds a certain limit, total fixed cost will be incremental. It is c

When the actual output had not achieved when certain limit, the marginal cost decreases progressively along with the output expansion; When the output surpasses certain limit, the marginal cost increases progressively along with the output expansion.Because, when the output surpasses certain limit,

When the actual output is not up to a certain limit, diminishing marginal cost with the expansion of production; when the output exceeds a certain limit, increasing marginal cost with the expansion of production. Because, when the output exceeds a certain limit, the total fixed costs will increase.

When the actual output has not achieved certain limit, the marginal cost decreases progressively with enlargement of the output; When the output exceeds certain limit, the marginal cost is increased progressively with enlargement of the output. Because when the output exceeds certain limit, the tota