# propagation ##### 词义 - #词性/n 传播；扩展；宣传；培养 ##### 例句 - The propagation of stress waves in solids can be considered as a part of the field of acoustics or ultrasonics depending on the conditions . - 应力波在固体中的传播，根据其条件可视为声场或超声场的一部分。 - On the Promotion of New Study Method of Propagation Science by New Media - 新媒介催生新的传播学研究方法 - If a plant has spotted or crinkled leaves , do not use it for propagation . - 如果植物的叶子有斑点或者萎缩，就不要用来繁殖。 ##### 形态 - #形态/word_pl propagations