面对这些变化的环境，我国零售企业必须优化经营模式，提高自身竞争力。
Faced with these changes in the environment, China's retail enterprises must optimize the business model, to improve their own competitiveness.
面对气候变化，当树木生长的超出它们理想栖息地时，这些飞行的生态系统工程师对于重新植树能有巨大的帮助。
As trees outgrow their ideal habitats in the face of climate change, these flying ecosystem engineers could be a big help in replanting trees.
另一个理论是这些变化降低了母亲的恐惧和焦虑，使得她们可以更好地面对挑战。
The other theory is that these changes reduce the mothers' fear and anxiety so they can better face such challenges.
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