单词 已于 例句 DEFINITIVE EXAMPLES 权威例句〔SAFE〕A film cameraman was airlifted to safety yesterday after being trapped inside a volcano for two days. 一名电影摄影师在火山里被困了两天之后,已于昨天由飞机运送到一个安全的地方。朗文写作活用〔agenda〕A cop...