😊
🙂
😄
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🧫 This emoji represents a test tube. A test tube is a commonly - used glass instrument in experiments such as chemistry and biology. It is mainly used as a reaction container for a small amount of reagents or for collecting a small amount of gas, etc. It can symbolize scientific experiments, chemical research, biological analysis and other laboratory - related things or scenes.
I marked 🧫 in the notes of the chemistry experiment.
There is the 🧫 icon on the courseware of the biology class.