由
yóu
by (sb); from; because of; to be up to (sb)
In a story
政府出二十万，剩下的四十万由居民来出。The government would pay 200,000, and the residents would pay the remaining 400,000.加装电梯 · The Lift · HSK 4
“本人的存款，依照法律，由三个孩子平分。”“My savings shall be divided equally among my three children, in accordance with the law.”遗嘱 · The Will · HSK 5
Grammar with 由
由
由 — by (who does / handles it)
由…组成
由…组成 — be composed of / consist of
（由于）⋯⋯，以致⋯⋯
（由于）⋯⋯，以致⋯⋯ — so that (an unwanted result)
不由得
不由得 — can't help but
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