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How Do Crickets Make Their Chirping Sound?
蟋蟀是如何发出鸣叫声的？
精读先不看文字，完整听一遍。
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Male crickets chirp to attract females during warm evenings.雄蟋蟀在温暖的夜晚鸣叫以吸引雌性。
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They make sound by rubbing a hard vein on one wing against the other.它们通过将一只翅膀上的一条硬翅脉与另一只翅膀摩擦发声。
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This action is called stridulation and works like a tiny violin bow.这种行为称为鸣叫，原理类似于微型小提琴弓。
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Each species has its own chirp pattern and speed.每个物种都有独特的鸣叫模式和频率。
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Temperature affects how fast they chirp — warmer means faster.温度影响鸣叫速度：气温越高，鸣叫越快。
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Crickets hear with tiny organs on their front legs.蟋蟀用前足上的微小器官感知声音。
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Their songs travel well through quiet summer air.它们的歌声在寂静的夏日空气中传播得很远。
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This natural music helps scientists learn about insect behavior and climate.这种自然之声帮助科学家研究昆虫行为和气候变化。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Their songs travel well through quiet summer air. 它们的歌声在寂静的夏日空气中传播得很远。
- Male crickets chirp to attract females during warm evenings. 雄蟋蟀在温暖的夜晚鸣叫以吸引雌性。
- Each species has its own chirp pattern and speed. 每个物种都有独特的鸣叫模式和频率。
④ 懂 · 选一选
⑤ 今天会说这一句
Their songs travel well through quiet summer air.
⑥ 跟读并录音
Their songs travel well through quiet summer air.
第一版：录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达，自己说一句。
例子：Their songs travel well through quiet summer air.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中，敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课，可以去陈老师带读社（和自学通行不是同一份会员）。
课程开发中，敬请期待。