十三妹：妈妈65岁了，还能背出元素化合价，北大的我早忘了My mother is 65 years old, she can still recite the valence of elements.

Name: 十三妹：妈妈65岁了，还能背出元素化合价，北大的我早忘了My mother is 65 years old, she can still recite the valence of elements.
Uploaded: 2024-05-14T04:06:04+08:00
Description: 十三妹：妈妈65岁了，还能背出元素化合价，北大的我早忘了My mother is 65 years old, she can still recite the valence of elements.

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