His brother, George, helped him develop a special ink.

他的兄弟乔治帮助他发明了一种特殊的墨水。

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The octopus can release a cloud of ink if it feels threatened.

章鱼在受到威胁时会放出一团墨剂。

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In the past, numbers in the financial records of a company were written in red ink to show a loss.

VOA: special.2009.04.26

but I mark the whole paper up with a lot of red ink if there are mistakes,

但我在批论文的时候，也会把语法错误的地方用红笔标出来，

与哲学系教授 - SpeakingMax英语口语达人

The artist draws an image with oily ink onto a piece of stone or other flat surface.

VOA: special.2009.09.02

Adviser Ann Phillips was called in to vet a Matisse ink drawing for a client.

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Also on Thursday, a forensics expert testified Mr Bacanovic used a different ink to make a notation next to an entry for ImClone stock on a worksheet of Ms Stewart's stock sales.

BBC: NEWS | Business | Friend's testimony hits Stewart

It suggests using a ferromagnetic ink, which includes compounds like iron or iron oxide, for the tattoo.

FORBES: Nokia's Buzzy New Patent: A Tattoo That Vibrates When Your Phone Rings