unsuccessfully
adv. 失败地；无用
近义词：ineffectively，invain，vainly，abortively，disastrously，successfully，
英英释义
Adverb
- without success;
"she tried unsuccessfully to persuade him to buy a new car"
例句
- He had proposed marriage, unsuccessfully, twice already.他已经两次求婚，均未成功。
- I tried, albeit unsuccessfully, to contact him.尽管未与他联系上，可是我已尽力而为了。