vanguard
英 ['v?ngɑ?d]
美['v?nɡɑrd]
- 先鋒盾
- n. 前鋒科學(xué)衛(wèi)星
考試真題
- It might seem surprising to think about an item staying in space for that long, but the oldest satellite still in orbit—Vanguard 1—turned 60 in 2018.
2019年6月六級(jí)真題（第二套）閱讀 Section C
