gōng / chéng / shī / zhèng / zài / jiǎn / chá / wǎng / lù / liàn / jiē / céng / shì / fǒu / zhèng / cháng / gōng / zuò

工程师正在检查网路链接层是否正常工作。

The engineer is checking whether the network link layer is working properly.