A nonessential attribute of a thing.

某物或某人所特有的本质属性。

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A nonessential amino acid, C5H10N2O3, occurring widely in plant and animal tissue and produced commercially for use in medicine and biochemical research.

谷酰胺一种非必需的氨基酸，c5h10n2o3，大量的含于动植物组织，大量生产用于医药和生化研究。

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The crisis has led to the closure of a number of nonessential government services.

这场危机已导致了一些可有可无政府服务设施的关闭。

《柯林斯英汉双解大词典》

Two dozen biotechs have announced layoffs in the last two months, while others are closing down nonessential programs in a desperate bid to survive.

FORBES: Biotech Blues

It might be dangerous to pin a company's hopes on a decidedly nonessential product.

FORBES: Consumer Durables

Air Partner suggests, when a country starts to heat up, the quiet removal of nonessential personnel to hotels with good communications at a safe haven just over the border.

FORBES: Flight To Safety