我们周围有许多脏兮兮的怪物,有的拖着长尾巴在空中飞,有的像蛇或蚂蟥一样让人毛骨悚然。你肯定会问:“哪儿有这样的怪物?我怎么看不见?”这些怪物确实是我们看不见的,但它们却无时无刻不在寻找攻击我们身体的机会。更可怕的是,它们数量众多,我们既无处可逃,又无处可藏。 There are many dirty monsters around us, some dragging their long tails flying in the air, some of them creepy like snakes or leechs. You’re sure to ask, “Where’s such a monster? How can I not see it?” "These monsters are indeed invisible to us, but they are constantly looking for opportunities to attack our bodies. Even more frightening is that they are numerous and we have nowhere to escape and no place to hide.