two young women meditating together outdoors in the morning sunlight in a rainforest - 硫酸鈷 個照片及圖片檔精神上的, 傳統慶典, 活力
water quality assessment and analysis. scientists use a micrometer to collect water data ( sulfate-reducing bacteria, nitrifying bacteria, and iron bacteria ) for improvement and water sustainable development. - 硫酸鈷 個照片及圖片檔監視, 退伍軍人菌, 污染
physical tests of water sample. male environmentalist using micrometer tools for examining ph and oxygen quality to research and development. - 硫酸鈷 個照片及圖片檔退伍軍人菌, 實驗室
monitoring and assessing water quality. scientists collect water quality data ( sulfate-reducing bacteria, nitrifying bacteria, and iron bacteria ) and take notes in a checklist. - 硫酸鈷 個照片及圖片檔工程師, 大自然, 科學家
