吐痰

• expectoration
• spit
• expectorate

例句

1. 在许多国家，当众吐痰属不雅行为。
   In many countries it is considered rude to spit in public.
2. 随地吐痰是不允许的。
   It's not allowed to spit everywhere.
3. 当众吐痰是不礼貌的行为。
   It's the bad manner to spit in public.
4. 在公共场合随便吐痰是不礼貌的。
   It's rude to spit in public.