川の土手に座っている電球と指を生物学者 - ストックフォト＆画像

Chemist with bulb and raised finger sits on river bank

Biologist with test tube in mask, protective suit, finger down, sits on river bank

Ecologist with test-tube and mask, protective suit, finger down, sits on river bank

Ecologist looks at flask with water sitting on river bank

Photo of ecologist in mask, protective suit with test tube, thumb up, on river bank

Ecologist with bulb and raised finger down on nature

Ecologist with bulb and raised finger up in nature

Chemist looks at flask with water sitting on river bank

Chemist on river bank with test tube and water in hands

Ecologist with bulb writes in folder on banks of river, blurred background

Ecologist in safety glasses and respirator holds flask with water in hands on street

Biologist in respirator with test tube, finger down, on blurred background

Ecologist in respirator with test-tube on blurred background

Ecologist with bulb and folder on river bank, blurred background

Biologist with bulb and folder on river bank, blurred background

Laboratory assistant with bulb in hand on river bank in summer