The first displays are sure to be primitive but likely very useful for the patients that receive them — you won’t be getting the full-color, hi-res images that come with ink, but functional displays.
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but functional displays
但是功能性显示
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The displays do not have to be fully functional, but should include some level of functionality.
该显示器不需要有完整的功能，但是应该包括某种层次的功能性。
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