This is of particular concern with toddlers learning to walk, because it causes them to bounce and tip forward, "she says."

这些问题对刚刚学习走路的孩子来说影响很大，因为穿上这类童鞋后，学步儿不得不跳着并踮起脚尖向前走。

youdao

I acknowledge that there are areas of concern, but every Web master faces the same issues, and the community is learning information management principles to address them.

我承认确实涉及到了某些领域，但每个web管理者都面对着相同的问题，而且社区正在学习一些信息管理原理，以便对它们进行定位。

youdao

I've recently been learning about OSGi and it seems to address this very concern, helping to make the functional structure of the system more obvious.

我最近在学习OSGi并且看起来它解决了这个高度关注的问题，帮助系统功能结构更容易被理解。

youdao

Exploration of 21st century learning or skills has emerged from the concern about transforming the goals and daily practice of learning to meet the new demands of the 21st century, which is characterized as knowledge- and technologically driven.

UNESCO: EDUCATION