About unapproved sentences

You may see some sentences in red. These sentences are not approved by Tatoeba's community. They raise copyright issues or are otherwise problematic. If you are a contributor, please avoid translating them.


  • date unknown
He studies biology very hard.
  • date unknown
linked to #15381
  • date unknown
linked to #111533
linked to #500623
linked to #907614
linked to #933175
linked to #933176
linked to #933178
linked to #933179
  • duran
  • Jan 14th 2012, 16:31
linked to #1360758
linked to #1822266
linked to #2580479

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Sentence #292150

He studies biology very hard.

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