The new intern was asked to handle the client call alone for the first time.

這位新實習生第一次被要求獨自處理客戶來電。

Many business travelers prefer to fly alone so they can work during the trip.

許多商務旅客偏好獨自搭機，這樣在旅途中就能工作。

Please do not leave the warehouse alone after the security system has been activated.

保全系統啟動後，請勿單獨離開倉庫。