
zusammentragen
to compile
To collect information or facts from different places and bring them together in one place.
Für das Referat müssen wir noch viele Fakten zusammentragen.
For the presentation, we still have to compile a lot of facts.
to gather / compile
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to compile
To collect information or facts from different places and bring them together in one place.
Für das Referat müssen wir noch viele Fakten zusammentragen.
For the presentation, we still have to compile a lot of facts.

to gather
To carry several physical objects to a shared place.
Die Kinder halfen, das trockene Laub im Garten zusammenzutragen.
The children helped gather the dry leaves in the garden.
'Zusammentragen' (to gather/compile) is a separable verb. The prefix 'zusammen' stands at the end of the sentence in a main clause. In the infinitive with 'zu', 'zu' comes between the prefix and the verb.
Der Historiker trägt alle Fakten für sein Buch zusammen.
The historian compiles all the facts for his book.
The verb consists of 'zusammen' (together) and 'tragen' (to carry). The basic idea is always to collect different things from different places at one central point.
Wir müssen noch genug Holz für das Lagerfeuer zusammentragen.
We still have to gather enough wood for the campfire.
The object reveals the meaning. With abstract objects like 'Informationen' (information) or 'Daten' (data), it is about collecting knowledge. With physical objects like 'Laub' (leaves) or 'Steine' (stones), the literal gathering is meant.
Die Journalistin hat Material für einen spannenden Artikel zusammengetragen.
The journalist compiled material for an exciting article.
In the abstract meaning, the verb is often combined with nouns from the area of knowledge and research. Common phrases are 'Fakten zusammentragen' (to compile facts), 'Informationen zusammentragen' (to gather information), or 'Beweise zusammentragen' (to gather evidence).
Die Polizei trägt derzeit alle Beweise gegen den Verdächtigen zusammen.
The police are currently gathering all the evidence against the suspect.
to collect / gather
Informationen sammeln generally means obtaining and accumulating material. Informationen zusammentragen emphasizes bringing information from different sources together in one place to create an overview or a collection. For the orderly merging of information, zusammentragen is therefore the better choice.

Für den Bericht trägt Amir die Ergebnisse aus allen Befragungen zusammen.
For the report, Amir compiles the results of all the surveys.
Für den Bericht sammelt Amir zunächst Informationen zum Verkehr im Ort.
For the report, Amir first collects information about traffic in the town.