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- Fat, glucoprotein, calcium, phosphorus, etc. are the essential substances for the activities of the brain. The simplest method to supplement these substances is to obtain them from foods. 脂肪、糖蛋白、钙、磷等物质是大脑活动时必不可少的，补充这些物质的最简单的途径，是从食物中摄取。
- essential substances from water and cereals 水谷之气
- Her most essential quality is kindness. 她最主要的品质是善良。
- Effect of aerating treatment on physiological activities and essential substances in germinating brown rice 通气处理对发芽糙米生理活性及主要物质含量影响
- Surprise is an essential component of my plan. 我这项计划主要就是想使大家惊喜一下。
- Rice is our essential foodstuff in life. 大米是我们生活的基本食物。
- National unity is essential in time of war. 举国团结在战时是非常重要的。
- Substances consist of small particles called molecules. 物质是由叫做分子的微粒组成的。
- essential substance for reproduction 生殖之精
- What is the essential theme of the play? 这剧本的主题是什麽?
- Limit your expenditure to what is essential. 你要把开销限制在必要的范围内。
- It is essential that he get up early. 他有必要早起。
- The act of obtaining usable substances from unusable sources. 废物利用从无用的东西中获取有用物质的行为
- Get a hustle on to stockpile these essential material. 赶快把这些重要材料贮放起来。
- The mixture will resolve into three simple substances. 这种混合物可分解成三种单纯状之。
- Mass education is essential in promoting democracy. 民众教育对提倡民主是非常重要的。
- It is essential to balance one's budget. 量入为出是很重要的。
- Mutual understanding is essential to friendship. 相互理解对友谊至关重要。
- Articulate speech is essential for a teacher. 对教师来说,口齿清楚是必不可少的。
- Car bombs have become essential terrorist weapons. 汽车炸弹已经成为恐怖分子主要的武器。
