Students should be able to make a selection from a range of reference materials and focus their attention on one of them.

学生要能从多种参考资料中作出选择，把注意力集中在其中一种上。

youdao

Focus and selection state are broadcast through a property.

焦点和选择状态通过一个属性传播。

youdao

Selection and focus state can be returned, and a slider control is provided to throttle how many tags are shown.

该组件可以返回选择和焦点状态，并且提供了一个滑块控件，以便控制显示的标记的数量。

youdao

Otherwise, it's aimed more at the casual carry-around crowd with a 40 percent smaller body, touch-screen focus selection, control ring exposure adjustment, a 3-inch 920k dot TFT LCD, art filters (in the smartphone app), image (or film) stabilization and 1080P 30 fps HD video.

ENGADGET

It serves consumers through its retail websites with a focus on selection, price, and convenience.

FORBES: #8 Amazon.com

As for the overall health and solvency of the Japanese economy, Grice says that there is ultimately some concern about the potential for defaults on government debt, but that this is a risk that investors can be hedged at attractive prices, enabling investors to focus on stock selection.

FORBES: SocGen Strategist: Get Ready To Buy Japan 'With Both Hands'