Depuis

Adposición

  sa

Determinador

  découverte

Substantivo

,  de

Determinador

  nombreuses

Adxectivo

  améliorations

Substantivo

  et

Conxunción coordinadora

  techniques

Substantivo

  alternatives

Adxectivo

  ont

Auxiliar

  été

🏖️

Auxiliar

  proposées

Verbo

.

Since its discovery, many improvements and alternative techniques have been proposed.

Since its discovery, many improvements and alternative techniques have been proposed.