One cannot assume communication expertise-imagine if someone just decided that they were a physicist and started trying to contribute to the field without the necessary background.
参与:人们不能自认为是传播专家--想象一下,有人自认为是物理学家并开始在没有任何必备(学术)背景的情况下就试图为这一领域作出贡献。
1.imagine是否为插入语+祈使句?if…是什么结构,是宾语从句吗?为什么后面没有主句?
2.decided这里是什么意思?