英文關鍵字
drip
yellow
oil
product
viscous
thick
round
metal
plate
test
tool
pipette
laboratory
closeup
process
table
crude
kazan
tatarstan
chemistry
sample
environment
discovery
energy
gasoline
science
liquid
black
chemist
chemical
petrol
analysis
petroleum
lab
fuel
power
methanol
diesel
element
study
experiment