open taring

例句：

1. 1. The door is open; please come in.
   门是开着的，请进来。
2. 2. The curtains have been opened to let the sunlight in.
   窗帘已经拉开，让阳光进来。
3. 3. The book was opened at the beginning of the meeting.
   会议开始时，那本书被打开了。