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I assume another reason you were so certain is that—rather famously—you swallowed a bunch of Helicobacter bacteria to prove that it caused stomach problems.
Taylor suggests that in more than 50% of cases of acute H pylori infection, hypochlorhydria lasts for several weeks.

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Open the tool →螺杆 (luó gǎn) means “a screw or a threaded rod”.
螺杆 is pronounced luó gǎn in Mandarin Chinese.
“A screw or a threaded rod.” is 螺杆 (luó gǎn) in Chinese.
This page has 2 example sentences using 螺杆, each with pinyin and an English translation.