unaccountably
/BrE ʌnəˈkaʊntəbli 
, AmE ˌənəˈkaʊn(t)əbli /
adverb
莫名其妙地 ‹vanish, appear›;
to be unaccountably late/missing/absent 莫名其妙地迟到／失踪／缺席;
(quite) unaccountably, … （非常）莫名其妙，…
unaccountably
English → Chinese
Oxford English–ChineseEnglish → ChineseOxford English–Chinese