不可缺少的

It is the production of high-grade silicone rubber products indispensable raw materials.

它是生产高档硅橡胶制品不可缺少的原料。

Sugar is a sine qua non ingredient in any kind of cake.

任何糕点中，糖都是不可缺少的原料。

Song and dance in their lives is an integral part.

歌舞是他们生活中不可缺少的组成部分。

Spare activity is the part of school life.

课外活动是学校生活不可缺少的一环。

It is very hard to say what spec will be strongest.

他一定是我竞技场队伍不可缺少的一员。

Water is the spring of human's life , and it is absolutely necessary for people's living.

水是生命之源，更是人类维持自身存在不可缺少的重要资源。

This kind of stair may be not as popular as traditional stairs. But it is indispensible for us.

这类楼梯也许不如传统楼梯那么普遍，但同样是我们生活中不可缺少的。

Sulfur is the indispensable chemical raw material on the world, early in BC Egyptian was used 2000 sulfureous blanch clothings, subsequently sulfur is used to again make take pigment.

硫是世界上不可缺少的化学原料，早在公元前2000年埃及人就用硫磺漂白衣物，随后硫又被用来制取色素。

After school activities are indispensabe tache of school life.

课外活动是学校生活不可缺少的一环。

Old city renewal is an indispensable tache in the urban development.

旧城更新是城市发展不可缺少的环节。

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。