始终选择防晒系数在40以上的产品，即使是冬天。

Alwayss choose an SPF above factor 40 - even in the winter.

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并在此基础上提出了安全系数选择的新方法。

A new selection method of security factor was raised.

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记住对于选择正确的滤波器系数，采样频率很重要。

Remember that the sample rate is very important to choosing the right coefficients.

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记住对于选择正确的滤波器系数，采样频率很重要。

Remember that the sample rate is very important to choosing the right coefficients.

youdao