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资源列表 > Thousands of volunteers gathered at the Los Angeles River recently for an annual cleanup of the urban waterway. Many residents know the river as a concrete drainage channel, but a major effort is underway to restore it to its natural state.
Thousands of volunteers gathered at the Los Angeles River recently for an annual cleanup of the urban waterway. Many residents know the river as a concrete drainage channel, but a major effort is underway to restore it to its natural state.
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