08/10/13 09:41:24
OALD見ても、
challenge
verb
1 [vn] to question whether a statement or an action is right, legal, etc.; to refuse to accept sth dispute
difficultyは変だね。
08/10/13 09:41:24
OALD見ても、
challenge
verb
1 [vn] to question whether a statement or an action is right, legal, etc.; to refuse to accept sth dispute
difficultyは変だね。