• 1. Main population: 主群体 | 和主群 | 主群
• 2. main natural population: 主要自然群体 | 释义主要自然群体

• 1.This agreement goes back some 70 years, and has almost entirely benefited the military at the expense of the main population.
  这个协议可以追溯到70年前，其目的差不多完全是为了军事设备，而损失了主体人口作为代价。
  dict.yoduao.com
• 2.After filamentous bacterium bulking the number of microbiota decreased, and rotifers, epistylis and arcella became the main population.
  系统内发生丝状菌污泥膨胀后，微型动物种类减少，主要优势种群为轮虫、累枝钟虫、表壳虫。
  dict.yoduao.com
• 3.In fact, because a large part of China is inaccessible and inhospitable, the density in the main population centres is much higher than those figures suggest.
  事实上，因为有中国的很大一部分土地交通不便且荒凉的，主要人口中心的密度远远高于这些数字所显示的。
  dict.yoduao.com

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