ARP

absolute refractory period (“绝对不应期”) 的首字母縮略詞

absolute refractory period 的词形 form-of

Air Raid Precautions (“空袭预防措施”)之簡寫

Air Raid Precautions 的词形 dated · form-of · 英國

The small white squares painted above the footboard at the ends of S.R. passenger coaches were a wartime addition to show that the lighting arrangements of vehicles so marked had been altered to conform to A.R.P. regulations.

1946 September and October, “The Why and The Wherefore: A.R.P. Coach Lighting Regulations”, in Railway Magazine, page 325:

Address Resolution Protocol (“位址解析協定”) 的首字母縮略詞

Address Resolution Protocol 的词形 Internet · form-of