Young scientists take water samples from the mountain river
Schlüsselwörter
river,
analysing,
biologist,
biology,
bottle,
chemical,
concept,
ecologist,
ecosystem,
epidemic,
examining,
expertise,
glove,
healthy lifestyle,
horizontal,
laboratory,
liquid,
measuring,
nature,
occupation,
outdoors,
people,
photo,
pollution,
protection,
research,
scientist,
scrutiny,
social issue,
transparent,
virus,
water,
couple,
family,
woman,
children,
walking,
love
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