This form of convectional activity is responsible for thunderstorms . 这种形式的对流活动就是大雷雨形成的原因。
2.
Study on the characteristics of candied dates ' convectional drying mass transfer 超分子化学的研究和进展
3.
The machine is helpful to enhance water quality , improve dissolved oxygen concentration in water and water convectional circulation , with strong water - stir capability , which is the key equipment for pond farming 该机对改良水质，增加水体溶氧条件效果极佳，提水搅水能力强，水体循环对流状况好，是内塘养殖的关键设备。
