Okay, the user wants me to translate "biological cue" into Simplified Chinese. Let me think about the correct term here. "Biological" is 生物的, and "cue" can be translated as 提示 or 信号. In the context of biology, "cue" often refers to a signal or a stimulus. So "biological cue" would be 生物信号 or 生物提示. But I need to check which is more commonly used. Maybe 生物信号 is more accurate here. Let me confirm. Yes, in scientific contexts, "biological cue" is typically translated as 生物信号. The user also mentioned if the content is already in Simplified Chinese, leave it as is. Since the input is in English, I need to translate it. So the answer should be 生物信号.