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n.箭，箭状物；箭头记号

arrack, arraign, arraignment, arrange, arrangement, arrant, array, arrear, arrears, arrest, arresting, arrhythmic, arrival, arrive, arrive at, arrive in (at), arrogance, arrogant, arrogantly, arrogate, arrowhead, arrowroot, arroyo, arse, arse-hole (US ass-hole), arse-licker, arsenal, arsenic, arson, arsonist, art, art-form, artefact (also artifact), arterial, arteriosclerosis, artery, artesian well, artful, artfully, artfulness,