医生怀疑他的腹泻是由阿米巴感染引起的。

The doctor suspected his diarrhea was caused by an ___amebic infection.

在实验中，我们观察到这种单细胞生物表现出类似阿米巴的变形运动。

In the experiment, we observed the single-celled organism displaying ___amebic movement as it changed shape.