The particle shi is used as a conjunction, which links two or more states expressed by i- or na-adjectival predicates. The meaning is, "and moreover."
Kono sutēki wa oishī shi, yasui/ yasui desu.
This steak is delicious and, what's more, it's inexpensive.
Heya wa seiketsu da shi, akarui/akarui desu.
The room is clean and, what's more, it's sunny.
Sono eiga wa omoshiroi shi, kyōikuteki desu.
This movie is interesting and, what's more, it's educational.
Kono kigu ha benri da shi, karui.
This tool is convenient, and it's light.
Kare wa yūnō datta shi, kenmei datta.
He was competent, and he was also wise.
Hope this was helpful, and see you next time!
°˖ ✧◝(○ ヮ ○)◜✧˖ ° こゆうきあいはら °˖ ✧◝(○ ヮ ○)◜✧˖ °