In the one into which Peter unsuspectingly sank the springs were broken, and he hit the backs of his knees against the wooden frame.
彼特
经意地坐下去，那
弹簧一下就断了，他膝背竟打在木框架上。
情地;
地;经心地;
过去式和过去分词;In the one into which Peter unsuspectingly sank the springs were broken, and he hit the backs of his knees against the wooden frame.
彼特经意地坐下去，那弹簧一下就断了，他膝背竟打在木框架上。
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