生态学专业通过研究环境中生物和非生物网来理解整个生态系统是如何运行的。
Ecology majors study the web of living and nonliving things in an environment to understand how the whole system works.
很清楚，保护只有通过国际间的合作努力才能实现，通过这些努力来控制人口，稳定大气结构，使地球上复杂的生物网完好无损。
Clearly, protecting will come only through coordinated international efforts to control human population, stabilize the composition of the atmosphere, and preserve intact Earth's complex web of life.
很清楚，保护只有通过国际间的合作努力才能实现，通过这些努力来控制人口，稳定大气结构，使地球上复杂的生物网完好无损。
Clearly, protecting will come only through coordinated international efforts to control human population, stabilize the composition of the atmosphere, and preserve intact Earth's complex web of life.
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