hand holding a test tube with a drop of water in the lake

a specialist s hand draws water into a flask from a river for further research in the laboratory. checks the level of water pollution. selective focus.

a-specialist-s-hand-draws-water-into-a-flask-from-a-river-for-further-research-in-the-laboratory

图像库的a specialist s hand draws water into a flask from a river for further research in the laboratory. checks the level of water pollution. selective focus. 图像 Image 146292485.

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A Specialist S Hand Draws Water Into A Flask From A River For Further Research In The Laboratory. Checks The Level Of Water Pollution. Selective Focus. 正版图像 123RF中国 - 高质量免版税图像库. Image 146292485.

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a specialist s hand draws water into a flask from a river for further research in the laboratory. checks the level of water pollution. selective focus.

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