英文關鍵字
asia
barge
bay
black
boat
cargo
coal
coalmine
coalpit
coast
colliery
commodity
deck
devisa
dock
energy
environment
equipment
exchange
expensive
export
foreign
fossil
fuel
geologic
harbor
indonesia
industrial
industry
island
mineral
mining
natural
nature
nonrenewable
ocean
operator
outdoor
pier
pile
pollutant
polluting
port
resources
sailing
sailor
sea
seafaring
ship
shipper
shipping
skipper
sky
tool
transport
transportation
tropical
vehicle
vessel
voyage
water
white