沙特阿拉伯占有25%的世界石油储备，是最大的石油出口商，而且在石油输出国家组织(OPEC)中起主要作用。
Saudi Arabia possesses 25% of the world "s proven petroleum reserves, ranks as the largest exporter of petroleum, and plays a leading role in OPEC."
PET扫描发现了脑部一个名为海马状突起(大脑侧面脑室壁上的隆起物，主要由灰白质构成，在泛记过程中起主要作用)的区域活性减弱的现象。
The PET scans detected reduced activity in an area of the brain called the hippocampus, which is known to be damaged in Alzheimer's.
单纯疱疹病毒造成了普遍性的唇疱疹，已经进入了他的大脑，消除了他的整个记忆区，包括海马状突起（大脑侧面脑室壁上的隆起物，主要由灰白质构成，在泛记过程中起主要作用）和控制感情以及行为的区域。
The herpes simplex virus, cause of the common cold sore, had traveled to his brain, wiping out his entire memory center, including the hippocampus and areas that control emotion and behavior.
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