The spitting habit became the target of public health authorities after the discovery of the tuberculosis bacillus in 1882 by the German biologist Robert Koch.
随地吐痰的习惯成为公共卫生机构的根除目标，是在1882年德国生物学家科赫发现了肺结核杆菌之后。
The spitting habit became the target of public health authorities after the discovery of the tuberculosis bacillus in 1882 by the German biologist Robert Koch.
随地吐痰的习惯成为公共卫生机构的根除目标，是在1882年德国生物学家科赫发现了肺结核杆菌之后。
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