2 sentences

1. 他的好奇心似乎是永无止境的。

   tā de hào​qí​xīn sì​hū shì yǒng​wú​zhǐ​jìng de.

   His curiosity is seemingly endless.

   Source: CCMatrix

2. 车辆的噪音对城市居民是永无止境的骚扰。

   chē​liàng de zào​yīn duì chéng​shì jū​mín shì yǒng​wú​zhǐ​jìng de sāo​rǎo.

   The noise of traffic is a constant irritant to city dwellers.

   Source: UM-Corpus: Education