base-collector junction

例句：

1. 1. The device's performance was greatly improved by the new design.
   通过新设计，该设备的性能得到了极大的提升。
2. 2. The scientist discovered a new way to use the material.
   科学家发现了一种使用这种材料的新方法。
3. 3. The team successfully completed the project on time.
   团队成功地按时完成了这个项目。