头号

严厉打击跨境电信网络诈骗，被公安机关列为今年专项行动的头号任务。

yán lì dǎ jī kuà jìng diàn xìn wǎng luò zhà piàn, bèi gōng ān jī guān liè wèi jīn nián zhuān xiàng xíng dòng de tóu hào rèn wù.

Strictly cracking down on cross-border telecommunications network fraud has been listed as the number one task of this year's special operation by the public security organs.