The lines were so finely etched as to be invisible from a distance.

这些线条蚀刻得如此精细，离远点都看不出来。

《柯林斯英汉双解大词典》

It didn't take long till I was deep enough for the house and the road to be invisible.

没过多久，我就走进了看不见房子和道路的深处。

youdao

The password should be invisible.

密码应该是不可见的。

youdao

Sam Sedaei says that identity is like an invisible man, and for him as an Iranian American, a coherent identity can be even more difficult to see.

VOA: standard.2010.06.15

But, and this will be the crucial point, notice Socrates should have continued the soul is invisible in that sense.

但是，这一点很重要，注意苏格拉底应该在这个意思上,继续阐述灵魂是无形的。

耶鲁公开课 - 死亡课程节选

You don't get the more modest conclusion invisible things can't be destroyed or it's a whole lot harder to destroy them.

不是得出个更谦虚的结论,无形的东西不会毁灭或者,要毁灭它是不容易的。

耶鲁公开课 - 死亡课程节选

The alterations may be invisible for a while, but people sense the underlying change.

ECONOMIST: Britain

You not only tried to keep a low profile, you tried to be invisible to the media.

FORBES: Dow Jones Interactive

Allowing yourself to be invisible in the workplace may be comfortable, but it is a surefire way to underearn.

FORBES: Is it time to earn more?