结存亏损有价证券组合收益和其平均成本之间的负差额。

Carrying loss the negative difference between the return on a portfolio and its average cost.

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2009年，包括商品与服务的美国出口总额1.553万亿美元，进口总额1.934万亿美元（差额净值为负3807亿美元）。

Total U.S. exports of good and services in 2009 were $1.553 trillion, and total imports $1.934 trillion (the net trade balance was therefore a minus $380.7 billion).

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