Of course, after Pluto's official demotion from planet to dwarf planet, the mission can no longer claim to be exploring the final planet frontier.

当然，自从冥王星被官方从大行星降格为矮行星之后，这个项目也无法被称做对于行星前沿的探索。

youdao

Retired Brigadier General Mehmood Shah served as a senior official in North West Frontier Province.

退休的马哈默德·沙伊尔准将曾经在西北边境省当过高级军官。

youdao

Retired Brigadier General Mehmood Shah served as a senior official in North West Frontier Province.

VOA: standard.2009.06.18

But an official with the Frontier Constabulary, which operates in the area, said the villagers had been killed by militants.

NPR: Pakistanis Protest Killing Of 18 In Village Raid

An official with the Frontier Constabulary denied any involvement in the killings and said it was militants who had attacked the homes.

BBC: Asia

This week the recently rare sounds of arms were heard on the Borneo frontier of Malaysia with the Philippines, where an incursion by nationals of the latter was met with official guns of the former.

FORBES: Asia's Week: The Rare Rumble of Armaments