known to be短语¹³⁶⁷² 基本例句 🌏大家都知道是 In this argument, the arguer states that researchers have found compounds that keep an enzyme known as PEP from breaking neuropeptides apart, which are known to be involved in learning and memory. 在本段论述中，论述者指出，研究人员已发现了某些化合物，可以阻止一种被称为 PEP的酶的物质将神经肽予以分解，而神经肽则是学习和记忆过程中所需涉及到的物质。 iciba