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How Do Bats Find Their Way in Total Darkness?
蝙蝠怎样在完全黑暗中找到路?
精读先不看文字,完整听一遍。
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Bats send out high-pitched sounds we cannot hear.蝙蝠发出人类听不见的高音。
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These sound waves bounce off walls, trees, and insects.这些声波会从墙壁、树木和昆虫身上反弹。
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Bats listen for the echoes with large, sensitive ears.蝙蝠用大而灵敏的耳朵接收回声。
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Their brains measure echo timing and direction quickly.它们的大脑迅速判断回声的时间和方向。
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This skill is called echolocation, like natural sonar.这种能力叫回声定位,类似天然声呐。
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Most bats use it more than their eyes at night.多数蝙蝠夜间更依赖回声定位而非视力。
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Some moths can hear bat calls and fly away fast.有些蛾子能听见蝙蝠叫声并迅速逃开。
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Echolocation helps bats catch food and avoid danger safely.回声定位帮助蝙蝠安全捕食并避开危险。
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
- Bats send out high-pitched sounds we cannot hear. 蝙蝠发出人类听不见的高音。
- Their brains measure echo timing and direction quickly. 它们的大脑迅速判断回声的时间和方向。
- This skill is called echolocation, like natural sonar. 这种能力叫回声定位,类似天然声呐。
④ 懂 · 选一选
⑤ 今天会说这一句
Bats send out high-pitched sounds we cannot hear.
⑥ 跟读并录音
Bats send out high-pitched sounds we cannot hear.
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:Bats send out high-pitched sounds we cannot hear.
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。