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How Bees Recognize Flowers by Electric Fields
蜜蜂如何通过电场识别花朵？
精读先不看文字，完整听一遍。
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Flowers carry weak positive electric charges because they’re grounded while the air around them holds negative ions.花朵因接地而带微弱正电荷，而周围空气则富含负离子。
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As bees fly, friction with air builds up a slight positive charge on their fuzzy bodies — like static electricity on a sweater.蜜蜂飞行时与空气摩擦，使其毛茸茸的身体带上微弱正电荷——类似毛衣产生的静电。
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When a bee approaches a flower, this charge distorts the flower’s electric field, and the bee detects those tiny changes with sensory hairs.当蜜蜂靠近花朵时，其电荷会扰动花朵的电场，蜜蜂则通过感觉毛感知这些细微变化。
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These electroreceptive hairs vibrate differently depending on field strength, sending signals to the bee’s nervous system.这些感电毛会随电场强弱不同而振动，向蜜蜂神经系统传递信号。
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Experiments show bees prefer charged flowers and learn to associate certain field patterns with nectar rewards.实验表明，蜜蜂偏爱带电花朵，并能学会将特定电场模式与花蜜奖励关联起来。
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After a bee visits, the flower’s charge changes temporarily — giving the next visitor a clue that nectar may be depleted.蜜蜂访问后，花朵电荷会暂时改变——为下一位访客提示花蜜可能已耗尽。
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This sense works alongside vision and scent, helping bees forage efficiently even in dim or windy conditions.这种感知能力与视觉、嗅觉协同作用，帮助蜜蜂在光线昏暗或大风条件下高效觅食。
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Researchers now use artificial electric fields to test pollination behavior and design better conservation strategies.研究人员现利用人工电场测试传粉行为，并制定更优的保护策略。
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
- Researchers now use artificial electric fields to test pollination behavior and design better conservation strategies. 研究人员现利用人工电场测试传粉行为，并制定更优的保护策略。
- These electroreceptive hairs vibrate differently depending on field strength, sending signals to the bee’s nervous system. 这些感电毛会随电场强弱不同而振动，向蜜蜂神经系统传递信号。
- Experiments show bees prefer charged flowers and learn to associate certain field patterns with nectar rewards. 实验表明，蜜蜂偏爱带电花朵，并能学会将特定电场模式与花蜜奖励关联起来。
④ 懂 · 选一选
⑤ 今天会说这一句
Researchers now use artificial electric fields to test pollination behavior and design better conservation strategies.
⑥ 跟读并录音
Researchers now use artificial electric fields to test pollination behavior and design better conservation strategies.
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：Researchers now use artificial electric fields to test pollination behavior and design better conservation strategies.
已记下。连续天数以后会显示在课表里。
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