| 释义 |
●ˈonly if(rather formal) used to state the only situation in which sth can happen 只有◆Only if a teacher has given permission is a student allowed to leave the room. 学生只有得到老师的许可才能离开教室。◆Only if the red light comes on is there any danger to employees. 只有红灯闪亮时才有危及职工的险情。See also if |