An user French
says…

Depuis
Adposition
  sa
Determiner
  découverte
Noun
de
Determiner
  nombreuses
Adjective
  améliorations
Noun
  et
Coordinating conjunction
  techniques
Noun
  alternatives
Adjective
  ont
Auxiliary
  été
🏖️
Auxiliary
  proposées
Verb
.

Since its discovery, many improvements and alternative techniques have been proposed.
Words and sentences
New
depuis

New
découverte

New
de

New
nombreuses

feminine plural of nombreux

New
améliorations

plural of amélioration

New
New
alternatives

feminine plural of alternatif

New
ont

third-person plural present indicative of avoir

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