1 (especially BrE) (NAmE usuallyinsolvable) that cannot be solved/explained無法解決;無法解釋VERBS | ADVERBVERBS➤be, seem無法解決;似乎難以解釋◇The problem seemed insoluble.問題似乎難以解決。➤remain依然難以解決ADVERB➤almost幾乎無法解決▸➤apparently, seemingly看似無法解決insoluble
adjective²
2impossible to dissolve in a liquid不能溶解VERBS | ADVERB | PREPOSITIONVERBS➤be不能溶解ADVERB➤highly極不易溶解➤relatively比較難溶解▸➤almost, practically, virtually幾乎不能溶解PREPOSITION➤in不溶於⋯中◇These chemicals are practically insoluble in water.這些化學物質幾乎不溶於水。