ultra-reliable       
adjective (also ultrareliable) uk/ˌʌl.trə.rɪˈlaɪ.ə.bəl/ us/ˌʌl.trə.rɪˈlaɪ.ə.bəl/
 极其可靠的
very reliable (= able to be trusted or believed due to working or behaving well in the way you expect)
  The team can always count on their ultra-reliable goalkeeper. 
If you have an ultra-reliable internet connection, you can stream the entire presentation.  如果您拥有极其可靠的互联网连接,就可以用流式传输整个发言。 
 - More examples
 - It's hard to make an assessment of our needs if we don't have ultra-reliable sales data.
 - They wanted to make sure that their daughter had a safe and ultra-reliable car that she could take with her to college.