1.诋毁者；贬低者；恶意批评者a person who tries to make sb/sth seem less good or valuable by criticizing it
But the pipe has one major detractor: It's something of a black box.
但是，管道有一个大缺点：它像是黑箱子。
He was fond of calling his detractor illiterate, denouncing his scientific theories as illegitimate and illusive.
他喜欢把他的恶意批评者称作文盲，公然抨击他的科学理论是非法的，迷惑人的。
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