4 sentences

1. 工程队正在地下铺设新的光缆。

   gōng​chéng​duì zhèng​zài dì xià pū​shè xīn de guāng​lǎn.

   The engineering team is laying new optical cables underground.

   Source: Dong Chinese Dictionary

2. 这些数据正通过光缆传送到世界各地。

   zhè​xiē shù​jù zhèng tōng​guò guāng​lǎn chuán​sòng dào shì​jiè gè dì.

   This data is being transmitted to all parts of the world via fiber optic cables.

   Source: Dong Chinese Dictionary

3. 电信公司计划在海底铺设一条新的光缆。

   diàn​xìn gōng​sī jì​huà zài hǎi​dǐ pū​shè yī tiáo xīn de guāng​lǎn.

   The telecommunications company plans to lay a new fiber optic cable on the seabed.

   Source: Dong Chinese Dictionary

4. 施工队在挖路时，不小心割断了地下的通讯光缆。

   shī​gōng​duì zài wā lù shí, bù xiǎo​xīn gē​duàn le dì​xià de tōng​xùn guāng​lǎn.

   While digging up the road, the construction crew accidentally severed the underground fiber optic communication cable.

   Source: Dong Chinese Dictionary