accumulationn.
英 əkjuːmjʊ'leɪʃ(ə)n | 美 ə,kjʊmjə'leʃən
中文n. 积聚，累积；堆积物
词根词源
accumulation (n.)late 15c., from Latin accumulationem (nominative accumulatio) "a heaping up," noun of action from past participle stem of accumulare "to heap up, amass," from ad- "in addition" (see ad-) + cumulare "heap up," from cumulus "heap" (see cumulus).
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