An user Spanish
says…

La
Determiner
  minuciosidad
Noun
  y
Coordinating conjunction
  metodología
Noun
  de
Adposition
  sus
Determiner
  investigaciones
Noun
  fueron
Auxiliary
  pioneras
Adjective
.

The thoroughness and methodology of his investigations were pioneering.
Words and sentences
New
la

New
minuciosidad

precision, minuteness

New
metodología

methodology

New
de

New
sus

New
investigaciones

plural of investigación

New
fueron

  1. third-person plural preterite indicative of ir
  2. third-person plural preterite indicative of ser

New
pioneras

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