he classroom, class had already be
Love is a vine that grows into our hearts.
ecosystem stabilityspecies diversity
We seem to ourselves to have
stability of ecosystemvariety of biology
生态的英文：ecological读音：英 [iːkə'lɒdʒɪk(ə)l; ek-]美 ['ikə'lɑdʒɪkl]
species diversitybiodiversity
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蔷薇朵朵7
