不可缺少的

Both fresh air and clean food are indispensable to us.

新鲜空气和干净的食物两者对我们是不可缺少的。

Geodetic work is indispensable for national development based on work, work is also unknown.

大地测量工作是国家建设不可缺少的基础性工作，也是默默无闻的工作。

Glucose was an obligatory nutrient for cell growth and maintenance, and could not be substituted by glutamine.

葡萄糖是细胞生长维持不可缺少的营养物质，谷氨酰胺不能代替葡萄糖的作用。

Taxation is an indispensable governmental conduct in market economy, and is also the main source of fiscal revenue.

税收是市场经济中不可缺少的一项政府行为，是政府财政收入的主要来源。

The "vehicle hand-over sheet" is one part of the contract recognized by both parties and is entitled the equal legal effect.

租借时，双方确认的车辆交接单是合同不可缺少的组成部分，与合同具有同等法律效力。

Friendship is an essential ingredient in the making of a healthful, rewarding life.

友谊是使人的一生健康而有益所不可缺少的组成部分。

Higher mathematics is the study of each course is based programming algorithm indispensable part.

高等数学是学习每一门课程的基础，是编程算法不可缺少的一部分。

Histidine, an essential ingredient for protein synthesis, is required by all living organisms.

组氨酸是蛋白质合成的必要组分之一，对所有生物来说是不可缺少的。

This tool is indispensable for turning and loosening soil in small patches.

这个工具是不可缺少的契机和土壤松动的小补丁。

The quantity of goods in the International Sale of Goods, one of the main conditions are indispensable.

商品的数量是国际货物买卖合同中不可缺少的主要条件之一。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。