英文關鍵字
analysis
beaker
bottle
calcium
chemical
chemicals
chemistry
compound
dangerous
discovery
equipment
experiment
factory
flask
glass
glassware
hazard
hazardous
hydroxide
industrial
industry
lab
laboratory
liquid
manufacturing
material
object
powder
product
reaction
research
risk
scale
science
scientific
scientist
substance
technology
test
tube
used
warning
white