Helicobacter
螺杆菌
🗣️ 情景例句
Usually a house is too expensive for the salary-earning class to buy.
通常房屋太贵，工薪阶层买不起。
Do you really want to know what I think?
你确实想要知道我认为什么吗？
Her mother died when she was eight years old.
她8岁时母亲就去世了。