帮我区分下nutrition和nutrional和nutrient单词的意思

第一.
nutrition 名词
/ njuːˈtrɪʃn; US nuː-; nuˋtrɪʃən/ n [U]
(process of giving and receiving) nourishment; food 营养; 滋养; 食物: adequate nutrition of the body 身体需要的充足的营养 * This food provides all the nutrition your dog needs. 本食品含有狗所必需的一切营养.
the study of human diet 营养学: a number of books on nutrition 若干本营养学的书.

第二.
nutritional / -ʃənl; -ʃənəl/ 形容词
adj: the nutritional value of a food 某种食物的营养价值.

第三.nutrient 可以是名词,也可以是形容词
/ ˈnjuːtrɪənt; US ˈnuː-; ˋnutrɪənt/ n, adj (fml 文) (substance) serving as or providing nourishment, esp for plants or animals 营养的, 滋养的（物质）: Plants draw minerals and other nutrients from the soil. 植物从泥土中吸收矿物质和其他养料.

都来自牛津高阶

nutrition
n [U]
(process of giving and receiving) nourishment; food 营养; 滋养; 食物: adequate nutrition of the body 身体需要的充足的营养 * This food provides all the nutrition your dog needs. 本食品含有狗所必需的一切营养.
the study of human diet 营养学: a number of books on nutrition 若干本营养学的书.
nutritional adj: the nutritional value of a food 某种食物的营养价值. nutritionally adv.
nutritionist n expert in nutrition 营养学家.
nutritious adj (fml 文) of (high) value as food; nourishing 有营养价值的; 营养价值高的; 滋养的: a nutritious meal, snack, etc 有营养的饭菜、 小吃等.
nutritive adj (fml 文)
1 serving as food 用作食物的; 有营养的: a nutritive substance 营养物.
2 of nutrition(1) 营养的: the nutritive process 营养作用.
nutrient
n, adj (fml 文) (substance) serving as or providing nourishment, esp for plants or animals 营养的, 滋养的（物质）: Plants draw minerals and other nutrients from the soil. 植物从泥土中吸收矿物质和其他养料.

nutrition [nju:'triʃən]
n. 营养
Nutrition：营养 | 营养之供给或摄取 | 营养学
nutrition n.：营养，营养学
nutrition n.：营养
Eco-Nutrition：营养
nutrition fat：消化吸收性脂肪
assessment of nutrional status：营养状况评价
nutrient ['nju:triənt]
a. 营养的,滋养的|n. 营养物,营养品
NUTRIENT：营养素 | 养分 | 营养，培养基
nutrient qi：营气
nutrient n.：营养素
nutrient fat：营养脂肪
Nutrient agar：营养琼脂 | 营养琼脂培养基 | 琼脂培养基

nutrition
n. 营养, 营养学

nutritional
adj. 营养的; 滋养的

nutrient
n. 营养物, 滋养物
adj. 营养的, 滋养的