The second plant is Mother-in-law's Tongue, which is again a very common plant, and we call it a bedroom plant, because it converts CO2 into oxygen at night.
第二种植物是虎尾兰， 它也是一种常见的植物， 我们称它为卧室植物， 因为它在会在夜间将二氧化碳转化为氧气。