The fixed costs of modern passenger aircraft are very high, but the marginal costs--the costs of carrying one more passenger if the plane is not full--are very low.

现代客机的固定成本巨大，但是其边际成本-在未满的前提下每增加一名乘客所增加的成本-非常低。

youdao

The fixed costs of modern passenger aircraft are very high, but the marginal costs--the costs of carrying one more passenger if the plane is not full--are very low.

现代客机的固定成本巨大，但是其边际成本-在未满的前提下每增加一名乘客所增加的成本-非常低。

youdao