opener
noun uk/ˈəʊ.pən.ər/ us/ˈoʊ.pən.ɚ/
(TOOL)
bottle, can, tin, etc. opener[ C ] 开瓶器／罐头起子等
a device for opening closed containers
(FIRST)
for openersinformal 首先
first
Just for openers, I'd like to ask a question. 首先，我想提个问题。