市场上有售一些燃料添加剂可提高增强汽油性能，使之用于汽油机时更高效。

Some fuel additives are available on the market that enhances and enriches gasoline, and makes it more efficient for use in gas-powered engines.

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语音增强实验结果表明，该改进谱减算法能有效地提高增强效果，更好地抑制音乐噪声，提高语音质量。

Speech enhancement experimental results show that this proposed method effectively improves the speech quality and reduces the musical noise.

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主要以谱减法为基础，结合人耳的听觉特性从而减少残留“音乐噪声”的影响；结合语音的语谱在时-频域分布特性从而提高增强后语音的听觉质量。

This paper studies the speech enhancement technology, and proposes an improved spectral subtraction method based on the auditory characteristics and the speech spectrum characteristics.

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And then you'll find that your level of competency increases, your confidence level improves,

到时候你会发现你的能力提高了，信心增强了，

学第二外语的时候 - SpeakingMax英语口语达人

plenty good for building strength and muscle mass and also endurance.

对增强力气和练肌肉还有提高耐力都很好。

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