ultrafast phenomena

例句：

1. 1.The ultrafast internet connection makes it easy to upload large files.
   超快的互联网连接使得上传大型文件变得容易。
2. 2. Ultrafast communication systems are essential for modern transportation.
   超快通信系统对于现代交通至关重要。
3. 3. The researchers developed an ultrafast laser that could cut through metals with ease.
   研究人员开发了一种超快激光器，可以轻松切割金属。