adv.看不见地；看不出地
Invis fade time down to 5 seconds. 隐形减至5秒。
Slowly, invisibly, your death will come upon you. 慢慢的，悄悄的，死神将会来到你的面前。
Every day disappears falls invisibly. 每天消陨于无形之中。
All microbes are invisibly small. 所有的微生物都小得看不见。
But the results appear gradually and invisibly. 可是效果却在无形、无意之中逐渐地显现。
