Cutting sandy shrub is an indispensable step that it grows.
沙生灌木的平茬是生长不可缺少的环节。
Edge detecting is an indispensable step of computer vision. It is a important procedure of image preprocessing technology.
边缘检测是机器视觉中必不可少的环节，是一种重要的图像预处理技术。
It's no doubt that data encryption is an indispensable step to ensure data's security in the open conditions of network transferring.
在网络传输的开放性环境下，对数据的加密处理无疑是保证数据安全的必要环节。
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