8 小时之前 · Pennsylvania, [b] officially the Commonwealth of Pennsylvania, [c] is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United …

8 小时之前 · Wi-Fi (/ ˈ w aɪ f aɪ /) [1] [a] is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of …

1 天前 · Tehran (/ t ɛ ˈ r æ n,-ˈ r ɑː n, ˌ t eɪ-/; Persian: تهران [tehˈɾɒːn] ⓘ, Tehrân) is the capital [6] and largest city of Iran.In addition to serving as the capital of Tehran province, the city is the …