英文關鍵字
pipeline
gas
oil
tube
sanctions
bulgaria
russia
embargo
flag
country
nord
stream
ukraine
war
knot
sanction
eu
european
union
europe
import
export
transit
block
blocking
ban
break
contract
business
closed
conflict
crisis
crude
economic
energy
fuel
gasoline
industry
natural
noose
petrol
petroleum
pipe
transportation
stop
agreement
petrochemical
market
supply