According to the basic principle of the digital image, this paper proposes a new display system, namely, "bubble imaging.", and focus on key issues of this system.

本文从数字图像显示的基本原理出发，提出了一种全新的成像系统，并对其中的关键问题进行了重点讨论。

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Instead I believe the focus needs to be on two key issues.

我认为重点应该放在两个关键问题上。

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Now more important is to focus on the key issues.

现在更重要的是将精力集中在关键的问题上。

youdao

With a focus on key topical issues such as marine pollution, exploitation and hazards, chapters range from the history of ocean management to current advances in marine science, observation and management applications, and the international agencies active in co-ordinating this work.

UNESCO: Troubled Waters

Let me focus on a few key issues from this latest rendition.

FORBES: Rajan is Back And Little Better

The narrow focus of the ruling on key issues like the individual mandate -- limiting it to taxing powers rather than general commerce -- represented an effort by the court to limit the government's authority.

CNN: Emotions high after Supreme Court upholds health care law