2 sentences

1. 他的文学功底非常扎实。

   tā de wén​xué gōng​dǐ fēi​cháng zhā​shi.

   His literary foundation is very solid.

   Source: Dong Chinese Dictionary

2. 这位演员的台词功底非常深厚。

   zhè wèi yǎn​yuán de tái​cí gōng​dǐ fēi​cháng shēn​hòu.

   This actor has a great command of his lines.

   Source: Dong Chinese Dictionary