第二部分（包括第三、四章）是基础研究部分。
The second part ( including the third, four chapters) is the basic research part.
第二部分(包括第三、四章)是基础研究部分。
The second part (including the third, four chapters) is the basic research part.
此外，还可包括第三方工具和电子边界之类的元素。
In addition, you include elements such as third-party tools and an electronic perimeter.
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