| 释义 |
● ˈonly if (ratherformal ) 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 |