美国4月进口 3510亿美元，前值4190亿美元。

Core Point - The article highlights that U.S. imports in April amounted to $351 billion, a decrease from the previous value of $419 billion [1] Group 1 - U.S. imports in April were reported at $351 billion [1] - The previous import value was $419 billion, indicating a significant decline [1]