音标：[ɡrei ˈsʌbstəns] ；

[医]灰质

词型变化：名词复数形式 : grey substances

【近义词】

grey matter灰质
substantia grisea灰质
gray substance灰质
gray matter灰质,灰白质...

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学英语单词

auxiliary fluid ignition

Baer's method

boada