A nonessential amino acid, C4H 7no 4, found especially in young sugar cane and sugar-beet molasses.

一种不重要的胺基酸，C4H 7no 4，尤指从小的甘蔗和甜菜的糖蜜中提取的。

youdao

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。

youdao

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》

In a city facing a multibillion-dollar deficit, every nonessential dollar spent is a dollar less available for hospital care or shelter for the homeless, or police for troubled neighborhoods.

WSJ: Stephen Goldsmith: Progressive Government Is Obsolete

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