insolvable
🇬🇧/ɪnˈsɒlvəb(ə)l/ 🇺🇸/ɪnˈsɑːlvəbl/ 34not easily solved; "an apparantly insolvable problem" "public finance...had long presented problems unsolvable or at least unsolved"- C.L.Jones
adjective [原级]不能解决的;不能溶解的
Pigment is insolvable. So choose the ink which is easily dispersable.
颜料是不能溶解的, 所以请选择易分散的墨水.
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