2 sentences for 打下 (dǎ​xià — lay)

1. 只有打下坚固的基础，才能在事业上取得成功。

   zhǐ​yǒu dǎ​xià jiān​gù de jī​chǔ, cái néng zài shì​yè shàng qǔ​dé chéng​gōng.

   Only by laying a solid foundation can one achieve success in their career.

   Source: Dong Chinese Dictionary

2. 通过努力，他为公司未来的发展打下了坚实的基础。

   tōng​guò nǔ​lì, tā wèi gōng​sī wèi​lái de fā​zhǎn dǎ​xià le jiān​shí de jī​chǔ.

   Through his efforts, he laid a solid foundation for the company's future development.

   Source: Dong Chinese Dictionary