The 2-Minute Rule for la pura
" or "Can you describe the variations amongst a Labrador as well as a Husky with regards to temperament and work out demands?"频率是单位时间内完成振动的次数，是描述振动物体往复运动频繁程度的量，为了纪念德国物理学家赫兹的贡献，人们把频率的单位命名为赫兹，简称“赫”。To post a clai
" or "Can you describe the variations amongst a Labrador as well as a Husky with regards to temperament and work out demands?"频率是单位时间内完成振动的次数，是描述振动物体往复运动频繁程度的量，为了纪念德国物理学家赫兹的贡献，人们把频率的单位命名为赫兹，简称“赫”。To post a clai