DCT

例句：

1. 1. The DCT is a popular tool for data analysis and visualization.
   DCT是一种受欢迎的数据分析和可视化工具。
2. 2. The DCT is used to measure the efficiency of a machine's operation.
   DCT用于测量机器运行的效率。
3. 3. The DCT is a crucial component in the design of modern electronic devices.
   DCT是现代电子设备设计中的关键组件。