Every forest differs from one another on account of the composition of its plant life.
Лӯбиё дар таркибаш оҳани зиёд дорад.
Beans have a lot of iron in their composition.
(Beans contain a lot of iron.)
Notice that the second sentence in Tajik is in the singular, whereas in English it sounds better in the plural.
Words with the pattern TAccvc (c=consonant; v=vowel) are usually Arabic in origin. Often a related word can be found beginning with MY and having the same consonants.
мураккаб: (adj.) complex; composed of many things; complicated
таркиби луғавӣ: lexical composition; vocabulary
From Standard Tajik-English dictionary (R. Olsen)
Дар таркиби луғавии забони тоҷикӣ калимаҳои арабӣ хеле зиёданд.
There are a lot of Arabic words in the Tajik vocabulary.