No one shall be held in slavery or servitude; slavery and the slave trade shall be prohibited in all their forms.
- Nadie estará sometido a esclavitud ni a servidumbre, la esclavitud y la trata de esclavos están prohibidas en todas sus formas.
At first there will be many unfamiliar words and grammatical forms, but you don't have to be afraid.
- Al principio habrá muchas palabras y formas gramaticales desconocidas, pero no tienes que temer.
Oxygen exists in two gaseous forms.
- O oxigênio existe em duas formas gasosas.
Human life faces the same alternatives that confront all other forms of life—of adapting itself to the conditions under which it must live or becoming extinct.
- A vida humana confronta-se com as mesmas opções que se oferecem a todas as outras formas de vida: adaptar-se às condições sob as quais deve existir ou deixar-se extinguir.