Language
Back 
Backbone
(n)UK
ˈbækbəʊn
US
ˈbækbəʊn
Definition: The series of vertebrae extending from the skull to the pelvis; the spine.
Meaning: Xương sống; cột trụ
Not Common
How to use "Backbone" vocabulary in sentence (example)
This version of Windows has been the backbone of all future releases from Windows 2000 to the latest Xp and Vista.
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