"Simplicity seekers" barely know how to turn on their phones and use them only in case of trouble.
“求简者”几乎不知道如何开机，而且只是在遇到麻烦的时候才用自己的电话。
Conical scan technique is widely used for radar seekers because of its simplicity, low cost and small size at millimeter wavelengths.
圆锥扫描体制由于其简单、体积小且成本低，较广应用于毫米波雷达导引头。
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