自然: 自然at ease; natural; free from affectation 短语和例子态度非常自然 be quite at ease; 她说英语, 语调很自然。 she speaks english with very natural intonation. 他不自然地笑了一笑。 he forced a smile. 她唱歌的嗓音很自然。 she sings wit
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Numerical computation of steady natural cavitating flow based on transport equation cavitaion model 基于传输方程空化模型的定常自然空化流场数值计算