Right now, if you want to test water in the field, you need a trained technician, expensive equipment like this, and you have to wait about a day for chemical reactions to take place and provide results.
現在 水質調査には 訓練を受けた技術者と 高価な機器が必要です 更に結果が出るまでに 化学変化が起こるのを１日弱待たなくてはいけません