Your cardiovascular system is an important and fragile group of structures that pumps nutrient - and oxygen-rich blood throughout your body.

你的心血管系统是一组重要而脆弱的结构，它输送你身体富含营养和氧气的血液。

youdao

You said that the nitrogen cycle is also an important nutrient cycle.

你说了，氮循环也是一个重要的营养循环。

youdao

When nutrients are used over and over in the environment, we call that a nutrient cycle.

当营养物质在环境中被反复使用时，我们称之为营养循环。

youdao

Fat-free foods don't fit into a nutrient-dense diet unless they're naturally free of fats, like vegetables and fruit.

CNN: Get the biggest bang for your calorie with nutrient-dense food

Lettuces usually shouldn't be planted near lavender: Leafy greens like nutrient-rich soil, while lavenders do better in drier conditions.

WSJ: Who Put Lettuce in My Daffodils?

Many supermarket vegetables are already grown hydroponically in nutrient-enriched water, and research indicates this technique could work well in space.

CNN: To boldly grow where no one has grown before