video of coronavirus and dna: illustration of the molecular relationship between virus and genetic material - 幽門螺桿菌 個影片檔及 b 捲影像00:10
stomach ulcer, endoscope view. also known as a peptic, or gastric, ulcer, it is erosion of the stomach lining, which leads stomach acids to attack the stomach wall. - 幽門螺桿菌 個影片檔及 b 捲影像00:31
stomach ulcer, endoscope view. also known as a peptic, or gastric, ulcer, it is erosion of the stomach lining, which leads stomach acids to attack the stomach wall. most such ulcers are associated with infection by the bacterium helicobacter pylori.. - 幽門螺桿菌 個影片檔及 b 捲影像00:15