You cannot take a day off without authorization.

未经批准你不得休。

Although favorite to win the race, the champion jockey had an off day and was unplaced.

那位第一流职业骑手最有希望赢得比赛胜利, 但他感到不舒服, 结果未得名次。

Although favourite to win the race, the champion jockey had an off day and was unplaced .

尽管那位第一流赛马职业骑手最有希望赢得比赛胜利，但他感到不舒服，结果未得名次。