Listening practice: Why some forests need fire
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Why some forests need fire
节目导览
本期是一集面向高三学生的英语听力练习，主题是火生态学：为什么有些森林需要周期性火灾来更新，以及为什么高强度火灾仍然可能伤害野生动物、引发火后侵蚀和洪水风险。
第一遍是完整英文叙述；中段用中文梳理主线，并提示 fire ecology、serotinous cones、prescribed fire 等关键词；最后完整重播英文原文，方便结合词汇再次听一遍。
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