it’s not here,改为同义句？

这句话可以改为："It is absent/at a different location/missing/not present."

以下是一些实现方式：

1. "It is absent." - 这个句子使用了 "absent" 这个单词表示 "不在" 的意思。可以这样使用："The book you're looking for is absent from this shelf."

2. "At a different location." - 这个句子表示物品在别的地方。可以这样使用："The meeting room is at a different location, please check with the receptionist for directions."

3. "Missing." - "Missing" 表示某物失踪了。可以这样使用："The documents you need are missing from the folder, please double-check your desk."

4. "Not present." - 这个句子表示某物没有出现。可以这样使用："The results of the experiment are not present in this report."

以下是示例代码：

1. if(book.shelf == null){
   console.log("The book you're looking for is absent.");
   }

2. if(meetingRoom.location == 'A'){
   console.log("The meeting room is at a different location.");
   }

3. if(documents.folder == null){
   console.log("The documents you need are missing.");
   }

4. if(report.experiment == null){
   console.log("The results of the experiment are not present.");
   }