在于

在於traditional

HSK 5#1868 by frequencyradical 土

zài yú["v"]

to lie in; to consist in; to be in; to depend on; to rest with

Examples

语言的学习在于日积月累。

Putting in effort daily is essential to language learning.

问题在于，金钱没有时间那样重要。

The problem is that the money is not of such importance as the time.

Part of the HSK 5 word list.

Learn 在于 the way it sticks: in sentences built from words you already know, scheduled so you review right before you'd forget.

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Definitions adapted from CC-CEDICT (CC BY-SA 4.0, modified). Example sentences from Tatoeba (CC BY 2.0 FR). Frequency ranks from the BCC corpus. Full credits on the Attributions page.