Name six perennials and six annuals suitable for indoor flower arrangement.列出多年生及一年生花朵各六种,它们必须是适合插花的.Objective To observe the efficacy of a multifactorial combination air disinfector in disinfecting indoor air.目的观察一种多因子组...
an indoor swimming pool室内游泳池Indoor pollution falls into two categories, that which we can see or smell, and pollution which is invisible and produces no odour.室内污染分为两种：一种是我们能看得见或闻得着的，另一种是无色无味的。The spa has 6 indoor pools,...