必需 bìxū HSK5 need Definitions Defs Origin Strokes Stroke Words Sentences Sents 4 sentences 氧气是物质燃烧所必需的条件。 yǎngqì shì wùzhì ránshāo suǒ bìxū de tiáojiàn. Oxygen is a necessary condition for combustion. Source: Dong Chinese Dictionary硒是一种人体必需的微量元素。 xī shì yī zhǒng réntǐ bìxū de wēiliàng yuánsù. Selenium is an essential trace element for the human body. Source: Dong Chinese Dictionary这项工程必需大量的资金投入。 zhè xiàng gōngchéng bìxū dàliàng de zījīn tóurù. This project requires a large amount of capital investment. Source: Dong Chinese Dictionary铁、锌和碘是人体必需的微量元素。 tiě, xīn hé diǎn shì réntǐ bìxū de wēiliàngyuánsù. Iron, zinc, and iodine are essential trace elements for the human body. Source: Dong Chinese Dictionary