请输入您要查询的英文单词：
单词
ˌdark ˈmatter
释义
ˌdark ˈmatter
NOUN
U
SCIENCE
a substance that scientists think exists out in space , but for which they have no direct proof 暗物质（一种被科学家认为存在于太空的物质，但没有直接的证据）