Even normal racing produces enormous straining, requiting the helmet to protect the neck and spine.

甚至是一般的賽車運動都會產生極大的張力, 這就要求頭盔能保護頸部和脊椎.

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When given a problem requiting multiplication or division, the computer solves it by adding or subtracting.

當給計算機一道要求用乘法或除法求解的題時,它能用加法或減法解出.

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