fireball
加入词篮firebomb
firecracker
firecracker
firefight
firefighter
firefly
fireman
fireplace
firepower
fireproof
firewall
firewood
firewood
firewood
firework
fireworks
firing
firing
firing line
firm
firmly
first
first aid
first aider
first base
first class
first class
first half
first mate
first of all
first offender
first-aid course
first-aid kit
first-aid post
first-aid supply
first-class
firstborn
firstly
fiscal
fish
fish scale
fish-hook
fisherman
fisheye lens
fishing
fishing line
fishing rod
fishing tackle
fishmonger
fission
fission
fission fragment
fission material
fission product
fission yield
fissionable material
fist
fit
fit
fit in
fitment
fitment
fitness
fitness
fitting
fitting room
five
fix
fix position
fixed
fixed air
fixed carbon
fixer
fixture
flag
flagpole
flagship
flame
flaming
flank
flannel
flap
flap
flare
flash
flash flood
flashbulb
flashlight
flat
flat
flat price
flat rate
flat tyre
flat-beaked
flatlet
flatmate
