Besides, it should be simple structure, light quantity and it can be convenient to remove and pack.
而且对它要求结构简单，重量轻，可以方便拆装。
The risk of developing ALS also increased as the number of pack-years smoked (product of the number of packs per day and the number of years that quantity was smoked).
罹患ALS的风险性也与吸烟的数量相关（日吸烟量和年吸烟量）。
应用推荐