He has carried out extensive research into renewable energy sources.

　　他已經對再生能源進行了廣泛研究。

　　The research was carried out on a modest scale.

　　這個研究項目開展的規模不算太大。

　　The experiments were carried out under simulated examination conditions.

　　試驗是在模擬的情況下進行的。

　　Carry on the good work!

　　干得不錯，繼續努力吧！

　　She ignored him and carried on with her work.

　　她沒理他，繼續干她的活。