She said the U. S. has made substantial progress over the years.
她提到，多年来，美国已取得了实质性的进展。
Don't see substantial progress.
完全看不到实质性的进展。
Substantial progress has been made, but soil erosion is far from being under control.
这一切都取得了重大成就，但土壤侵蚀问题仍远未得到控制。
Substantial progress has been made, but soil erosion is far from being under control.
这一切都取得了重大成就，但土壤侵蚀问题仍远未得到控制。
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