It can indicate ink low and ink finish.

具有墨量低和墨尽提示功能。

youdao

In places, the ink from the original text is no more than a faint stain, so the scientists studying it need a technique that is sensitive to very low concentrations of ink.

在有些地方原文的墨迹只剩下些微印痕，这使得研究它的科学家需要用能识别超低浓度的墨迹的技术。

youdao

Ink to print the biggest advantage is low cost.

墨轮的最大优点是打印费用低。

youdao

But the main characteristic that limits each of those devices' ability to innovate is their reliance on Taiwan-based Prime View International, whose "E Ink" provides the low-power, easy-on-the-eyes reading experience.

FORBES: Magazine Article

Before HP brought us the low-priced ink-jet printer all office printing was black.

FORBES: Will Meg Whitman be more like Steve Jobs, or Carol Bartz? HP's future is at stake

More than 20 million flexible plastic displays are on the market today, according to Sriram Peruvemba, vice-president of marketing for E Ink, the company that developed the low-power display technology for the Amazon Kindle and many other e-book readers.

CNN: HP developing a 'Dick Tracy' wristwatch