詳細的英文意思particularindetail2，英文單詞翻譯intheeventthat..，if，incaseOnce，atonetime，everturnaround假如，如果----if,maybe曾經-----once轉身------turnaroundsupposethatinthateventatonetimeoranotherturnaboutif,once,ataonceturnaround3，具體的用英語怎么說concretea.具體的,如concreteoperations具...