For example, you might need to enter data before you know or can validate what the foreign value is.
例如，可能需要先输入数据，然后才能知道或验证外键是什么。
The traditional answer assumes US exports are 100% US value-added and US imports are 100% foreign value-added.
传统的回答假设美国的出口是100%美国增值，而美国的进口是100%外国增值。
The traditional answer assumes US exports are 100% US value-added and US imports are 100% foreign value-added.
传统的回答假设美国的出口是100%美国增值，而美国的进口是100%外国增值。
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