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[医][=periaqueductal gray stimulation]导水管周围灰质刺激，兴奋作用
🗣️ 情景例句
They had a special on frozen fish down at the supermarket.
超级市场 冷冻鱼特价。
When were you born?
你是什么时候出生的？
Imagine their surprise and delight when they broke open the packing cases and found that the fourth engine was sweet as honey -- still in perfect condition.
想一想他们所感受到的惊奇和兴奋 —— 当他们拆开包装箱时，他们发现第4台发动机就像蜂蜜一样甜 —— 发动机完好无损。