单词	schlieren
释义	schlieren plural noun schlie·​ren ˈshlir-ən  1 : small masses or streaks in an igneous rock that differ in composition from the main body 2 : regions of varying refraction in a transparent medium often caused by pressure or temperature differences and detectable especially by photographing the passage of a beam of light schlieric ˈshlir-ik  adjective Word History Etymology German First Known Use 1898, in the meaning defined at sense 1
随便看	knackery knacking knacks knackwurst knackwursts knacky knag knagged knaggy knags knaidel knaidlach knap closed gentian closed hand closed in closed in (on) closed in on closed issue closed loop closed mortgage closed off closed one's doors closed one's doors (to) closed one's doors to

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