課題４７ これらのモデルは、他の従来のモデルに比べて応答が速いのみならず、価格も安い。
私案 These models are not only faster in responce but also cheaper than other conventional ones.
These models have not only faster responces, but also not expensive prices than other traditional ones.
参考訳 Not only do these models respond much faster than any other conventional model, they cost less.
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eg.: the device fast in responce to do ; the device quick in responce to do
any other conventional model, or other conventional models. be care about singular or plural