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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
Hi, Marilyn,
嗨 ，Marilyn。
Her attitude towards him has changed.
她对他的态度改变了。
He did not know from which part of Africa his ancestor had come.
他不知道祖先来自非洲的什么地方。