invisible

adj.看不见的；无形的

n.隐形人(或物)

Some stars are invisible to the naked eye. 有些星体肉眼是看不见的。

Germs are invisible to the naked eye. 细菌用肉眼看不见。

The mends were almost invisible. 修补过的地方几乎看不出来。

Aunt Harriet presided over an invisible army of servants that continuously scrubbed, cleaned, and published. 姑母哈丽特支配着一大群看不见的仆人，他们不停地刷洗、打扫和擦拭。

Her fantasy is to become invisible. 她的幻想是变成隐形人。

Sometimes feel as if I'm invisible, as if no one can see me at all. 有时觉得自己像个隐形人。