To have a one-sided perspective, focusing on one aspect while neglecting others, thus failing to see the whole picture.
他在制定发展计划时，只强调了短期的经济效益，对长远的社会影响和环境保护东向而望，不见西墙。
When formulating the development plan, he only emphasized short-term economic benefits, completely neglecting the long-term social impact and environmental protection, a typical case of looking eastward and not seeing the west wall.
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