substatement

例句：

1. 1. The substatement in the sentence is that the meeting will be held tomorrow.
   句子中的次级陈述句是会议将于明天举行。
2. 2. The substatement was that he would arrive at the airport on time.
   次级陈述句是说他将准时到达机场。
3. 3. The substatement in the report is that the project has been completed successfully.
   报告中的次级陈述句是项目已经成功完成。