英文關鍵字
analysis
analyzing
assistant
biochemistry
biologist
biology
chemist
chemistry
closeup
conducting
ecology
environment
equipment
examining
experiment
expert
expertise
fertility
fuel
improvement
industrial
industry
lab
laboratory
liquid
marking
material
nature
oil
petrol
preservation
product
quality
raw
reaction
research
researcher
sample
science
scientist
soil
solution
study
studying
substance
test
testing
transparent
tube
wells