Complex sentence: Once inside the orchid, the virion uncoats, binds its coat protein to the host on the 5 SL 1 RNA stem loop and begins incorporating its RNA into it.
Split into simpler sentences: Once inside the orchid, the virus binds to the host RNA on the 5 SL 1 RNA stem loop of the host. Then the virion uncoats, binds its coat protein to the host RNA and begins incorporating its RNA into it.