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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
I couldn't be more sure, Susan.
我再确定不过了， Susan。
But it looks like that's out of the question.
看现在看来不可能了。
I don't like autumn and winter.The days are short and the nights are long.The sun rises late and set early.
我不喜欢秋天和冬天，因为此时白天短而夜晚长，太阳升得迟而落得早。