植物从土壤中吸取矿物质和其他养分。
养分很快就被滤掉了。
一种非本地的植物通过占用土壤中的养分来扼杀本地植物。
A non-native plant chokes out native plants by hogging the nutrients in the soil.
养分和矿物质容易从沙质土壤中流失，因此沙质土壤往往较为贫瘠。
Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor.
由于养分的重要性和贫乏性，营养循环是我们在这门课中会讲到的最重要的生态系统过程之一。
Because of the importance of nutrients and their scarcity, nutrient recycling is one of the most significant eco-system processes that we'll cover in this course.
长期影响主要是由树种组成的变化以及随之而来的森林结构、生产力和养分吸收的变化所导致的。
Long-term effects are primarily mediated by changes in tree species composition and the consequent alterations of forest structure, productivity, and nutrient uptake.
这些条件有助于进化出用于支撑枝干的结构、运输水分和养分到植物各部分的导管以及储存水分的结构。
These conditions favored the evolution of the structures that support the body, vessels that transport water and nutrients to all parts of plant, and structures that conserve water.
一旦腐殖质层消失，养分就无法从土壤中回收和过滤，致使土壤由肥沃变为贫瘠，只适于热带草原植被的生长。
Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation.
在现代农业中，土壤的矿物损耗是一个主要的问题，因为收割农作物会中断养分的循环，使其无法重新回到土壤中。
In modern agriculture, mineral depletion of soils is a major concern, since harvesting crops interrupts the recycling of nutrients back to the soil.
人们开始越来越多地使用脱水后的动物粪便作为替代燃料，这同样会损害土壤，因为这些珍贵的土壤改良剂和植物养分的来源将无法再回归到土壤之中。
The increasing use of dried animal waste as a substitute fuel has also hurt the soil because this valuable soil conditioner and source of plant nutrients is no longer being returned to the land.
作为一个孩子，她渴望吸取知识的养分。
土壤这样贫瘠，植物能获得足够的养分吗？
他试探着提出了植物从空气中吸取它们的部分养分的观点。
He ventured that plants draw part of their nourishment from the air.
它们起到天然肥料的作用，帮助为未来作物的根系提供养分。
They serve as a natural fertilizer and help support the roots of future crops.
此外，还有人担心打印食品的健康价值：我们真的有可能从以食品为基础成分的“墨水”或类似的东西中得到需要的养分吗？
Also, here are worries about the healthy value of printed food: is it really possible to get what we need from food-based "inks" or something like that?
水在运输养分到全身发挥了关键作用。
Water plays a key role in the transportation of nutrients throughout the body.
再一次这些养分可以通过泥泵回收利用。
不同的作物轮耕，以防止土壤养分枯竭。
Rotate agricultural crops to prevent the sapping of nutrients.
小草将吸收到生长所需的养分、糖和能量。
The grass absorbs the nutrients, sugar and energy it needs to be able to grow.
只要提供养分，树木就能持续生长和翻身。
Just provide it the nutrients it needs and the tree will continue to grow and flourish.
碎石子可以用来补充土壤，增加土壤养分。
Gravel dust (see our global ideas bank's "Saving the Planet With Gravel dust") could be used to supplement the soil and increase soil nutrients even further.
传统食物水分含量较高，稀释了其养分含量。
The higher water content in conventional foods dilutes its nutrient contents.
传统食物水分含量较高，稀释了其养分含量。
The higher water content in conventional foods dilutes its nutrient contents.
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