老化

lǎohuà

HSK 7

老化 — lǎohuà

1. to age; to undergo aging (of a person, population, or material)

   这批塑料在阳光下长期老化，变脆了。 zhè pī sùliào zài yángguāng xià chángqī lǎohuà biàn cuì le — This batch of plastic has aged after long exposure to sunlight and become brittle.

2. to become outdated (of knowledge, information)

   如果不及时更新教材，所学的知识会老化。 rúguǒ bùjí shí gēngxīn jiàocái suǒxué de zhīshí huì lǎohuà — If teaching materials are not updated in time, what students learn will become outdated.