一、Mutualism 托福听力原文： NARRATOR: Listen to part of a lecture in a biology class. FEMALE PROFESSOR: OK. Today I'd like to spend some time going into more detail about symbiosis. Symbiosis. What is it?

???近日，中国科学院微生物研究所黄英研究团队在 The? ISME? journal 发表论文，题 为 Proximity-based defensive mutualism between? Streptomyces ? and? Mesorhizobium ?by sharing and sequestering iron ...