英文關鍵字
background
boiling
bucket
burnt
calcite
calcium
carbonate
chalk
closeup
garden
geology
hydroxide
isolated
lime
limestone
material
metal
mineral
natural
nature
ore
oxide
pebble
pests
porous
quicklime
season
sedimentary
slaked
slaking
specimen
spring
steam
steel
texture
tree
white
whitewash
work