amoeba proteus

例句：

1. 1.Amoebae are microscopic organisms that can swim and move around in water.
   阿米巴是微小的生物，可以在水里游动和移动。
2. 2. The amoebae were found to be toxic to humans.
   这些阿米巴对人类是有毒的。
3. 3. The amoebae were so small that they could not be seen with the naked eye.
   这些阿米巴太小了，肉眼无法看见。