extension field

例句：

1. 1. The company's expansion intonew markets is a key driver of itsgrowth.
   该公司向新市场扩张是其增长的关键驱动力。
2. 2. The research team has identifiedseveral promising extensions in the field of renewableenergy.
   研究团队已经确定了可再生能源领域的几个有前途的扩展方向。
3. 3. Theuniversity has established an extensionfield to support students pursuing advanceddegrees.
   大学已设立一个扩展领域，以支持追求高级学位的学生。