1.
These foods, Zeng said, are high in protein or essential elements and accelerate children's growth.
曾医师说，这些食物里富含蛋白质及生命必需元素，能够加速儿童的生长发育。
2.
The Effects of Essential Trace Elements Manganese, Iron and Zinc on the Content of Aloin and Aloe-emodin in Aloe Barbadensis Mill.;
生命必需微量元素锰、铁和锌对芦荟体内芦荟苷、芦荟大黄素含量的影响
3.
Selenium( Se) is a necessary trace element in the body, which possesses many physiological functions.
硒作为人体必需微量元素,有多方面的生理功能。
4.
Food is essential for life.
食物是生命所必需的。
5.
Food is necessary for life.
食物对生命是必需的。
6.
Water is essential for life – to drink, bathe, cook,clean, grow food, fuel engines, support ecosystems.
水是生命必需品，饮用、沐
7.
Oxygen is necessary for life.
氧气是生命所必需的。
8.
A vital or animating force;lifeblood.
生命、源泉维持生命所必需的力量、活力、生命液
9.
The essential nutrients in body can be grouped into6 categories: proteins, fats, carbohydrates and trace elements, vitamins, minerals and water.
人体需要的必需营养素可分成六大类：蛋白质、肪、水化合物与微量元素、生素，矿物质和水。
10.
Nitrogen is inert and will not support combustion; however, it is not life supporting.
氮是不活泼的，不支持燃烧；但是它不是维持生命的必要元素。
11.
Source of essential nutrients, including vitamins C, B complex, calcium, phosphate and selenium.
提供必需营养素，包括维他命C、杂、、及硒。
12.
The Studies of Coordination Behavior of Fourth Period Trace Elements with Biological Ligands;
第四周期人体必需微量元素与生物配体配合行为研究
13.
Iron is an indispensable trace element which is easily deficient in human body.
铁是人体必需的和易缺乏的微量元素。
14.
Selenium is an important trace element for human heal th.
硒是一种重要的人体必需微量元素。
15.
Air and water are indispensable to life.
空气和水是生命所必需的东西。
16.
Food is necessary to maintain life.
食物是维持生命所必需的。
17.
The necessities of life include food, clothing, and shelter.
生命的必需的，包括食物，衣服，住处
18.
Water is one of the materials required to sustain life.
水是维持生命所必需的物质之一。