environmental
analysis
analyzing
bacteria
biological
biologist
biology
chemical
closeup
dirty
ecologist
ecology
environment
equipment
examining
experiment
expertise
glass
gloves
hand
holding
inspecting
lake
learning by doing
lesson
liquid
living things
magnifying
natural
nature
outdoor
outdoors
pollution
protection
quality
quality control
research
researcher
river
sample
science
scientific
scientist
stem education
test
test tube
tube
water
water plants
water pollution
定額
Close up ecologist hands wears blue gloves, holds magnifying glass and glass that contain sample water and water plants from the lake. Concept, explore, inspect water qualityの素材 [FY310209433844]
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