2.
A549和A549/DDP细胞的非极性（A和C）和极性（B和D）代谢物的OPLS-DA模型图和OPLS-DA模型S-plot图
OPLS-DA results and S-plot results of non-polar metabolite (A, C) and polar metabolite (B, D) of A549 and A549/DDP cells
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