为平衡方程序，总的来说，美国人就不得不出售资产(股票，不动产)或者从国外借款(通过发行财政长期债券)来偿还他们购买的商品。
To balance out the equation, Americans, in the aggregate, either have to sell assets (stocks, real estate) or borrow money from abroad (by issuing Treasury bonds) to pay for the goods they buy.
通过构建广义估计方程模型评价治疗长期影响。
Generalized estimating equation models were constructed to assess the effect of treatment over time.
斜压原始方程半隐式全能量守恒格式的构造问题长期没有解决。
The design of a total energy conserving semi-implicit scheme for the multiple-level baroclinic primitive equation has remained an unsolved problem for a long time.
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