2 sentences for 瓶颈 (píng​jǐng)

1. 他用手紧紧握住瓶颈，防止水洒出来。

   tā yòng shǒu jǐn​jǐn wò​zhù píng​jǐng, fáng​zhǐ shuǐ sǎ chū​lái.

   He gripped the neck of the bottle tightly to prevent water from spilling out.

   Source: Dong Chinese Dictionary

2. 资金短缺成为了公司进一步扩张的瓶颈。

   zī​jīn duǎn​quē chéng​wéi le gōng​sī jìn​yī​bù kuò​zhāng de píng​jǐng.

   A shortage of funds has become a bottleneck for the company's further expansion.

   Source: Dong Chinese Dictionary