So these organisms like this are abundant in the world around us and our immune system prevents us from getting sick most of the time.

在我们周围充斥着像这样的生物体,而免疫系统在大多数时候能够抵御疾病

耶鲁公开课 - 生物医学工程探索课程节选

You can say like, if you are trying to describe something, you can say like,

你可以这样说，当你想描述什么东西的时候，像这样，

紧张是学英语的敌人 - SpeakingMax英语口语达人