選択的
analyzing
beaker
biochemist
biology
biotechnology
blue
bottle
care
chemical
chemist
chemistry
class
clinic
closeup
cylinder
discovery
equipment
experiment
flask
focus
fuel
glass
hand
health
industry
instrument
lab
laboratory
lighting
liquid
medical
medicine
microbiology
oil
pharmaceutical
reactants
research
school
science
scientific
stirring
technician
technology
test
tube
water
worker