A system of natural relationships by which organisms in a community depend on each other for food.
Late 19th century; earliest use found in Edward Aveling (1849–1898), Marxist campaigner.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。