副詞 long since:

1. of the distant or comparatively distant past is Scottish
   同義詞：long ago, lang syne

1. He has long since been recognized as a great playwright.
   他早就被公認為偉大的劇作家了。
2. It has long since been satisfactorily established that a high executive does not have a large vocabulary merely because of the opportunities of his position.
   長期以來人們就有呈個想當(dāng)然的看法：高級行政管理人員不會有很大的詞匯量，因為處不那個位置上，他有的是機會。
3. His study is a chaos: his house keeper has long since given up trying to put his papers in order.
   他的書房亂七八糟，他的管家早已放棄為他整理文件了。
4. Long ago; long since.
   很久以前; 往昔