他们听了我的讲座，但是我怀疑他们到底听懂了多少。
They listened to my lecture, but how much did they take in, I wonder?
但是当外科医生在术前谈话中清晰传达了他们的意见后，病人可能仅仅听懂了一部分。
But while the surgeons believed they conveyed this information clearly during preoperative conversations, the patients probably heard only part of the story.
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