used to refer to the unpleasant feeling that some people have when they see robots (= machines that can carry out actions automatically), or pictures of a human being created by a computer, that appear very similar to a living human

Uncanny valley describes a situation in which a machine looks so eerily "almost but not quite human" that it just creeps people out. “恐怖谷理论”指的是“几乎是但不完全是人类”的机器会让人感觉毛骨悚然。