As other nations grow and spend more money on American products, the balance of trade should even out.

随着其他国家的发展，并且花更多钱来购买美国产品，贸易差额应该会拉平。

The balance of trade showed a surplus after 1999.

贸易余额自1999年后呈现顺差。

America's balance of trade has been deteriorating.

美国的贸易差额日趋恶化。

But could this phenomenon also be upending the global balance of trade?

不过，这一现象是否也导致了全球贸易的失衡呢？

Sometimes divided into the balance of trade in goods and services.

有时分为平衡商品和服务贸易的平衡。