The U.S. does still import some crude oil, most of which is heavy oil from Canada handled at certain American refineries on the U.S. Gulf Coast. Factoring in those imports, net U.S. oil trade balance is a positive 2.8 million barrels per day, as contrasted with the mid-2000s, when the balance was a deficit of 12 million barrels per day.
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需要特别说明,上述计算模型较为粗糙,并未考虑出货规模、手机厂商话语权等因素,不代表实际的终端成本。不过考虑到目前大部分手机均采用LPDDR5+UFS存储组合,比DDR4+MLC更贵,手机厂商实际面临的成本压力或许不会比上述数据更小。,这一点在超级权重中也有详细论述