分享 雖然你總是面不改色...
Urea - Wikipedia, the free encyclopedia 雖然你總是面不改色... 但我明白... 你帶給我與我帶給你加總而來的幸福感動:)Urea or carbamide is an organic compound with the chemical formula C O (N H 2) 2. The molecule has two —NH 2 groups joined by a carbonyl (C=O) functional group....
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