第1个回答 推荐于2018-02-23
to yield twice the result with half the effort
事半功倍
to get half the result with twice the effort
事倍功半
^_^本回答被提问者采纳
第2个回答 2007-03-06
Well begun is half done.
第3个回答 2007-03-06
gain twice with half effort.
第4个回答 2007-03-06
get twice the result with half the effort