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What Happens Inside a Compostable Coffee Cup?
可堆肥咖啡杯内部发生了什么
精读先不看文字,完整听一遍。
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Compostable cups look like plastic but are made from plant starches like corn or sugarcane fiber.可堆肥杯子外观像塑料,但由玉米或甘蔗纤维等植物淀粉制成。
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Special enzymes in industrial compost facilities break glycosidic bonds in the starch chains.工业堆肥设施中的特殊酶会分解淀粉链中的糖苷键。
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Heat, moisture, and microbes work together to turn the cup into carbon dioxide, water, and humus.热量、水分和微生物共同作用,将杯子转化为二氧化碳、水和腐殖质。
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Home compost bins rarely reach the 60°C+ needed for full breakdown within weeks.家庭堆肥箱通常无法在几周内达到完全降解所需的60°C以上温度。
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Certification labels like ‘ASTM D6400’ mean the cup meets strict disintegration and toxicity tests.‘ASTM D6400’等认证标识意味着该杯子通过了严格的崩解性和毒性测试。
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Dyes and lids must also be certified compostable—or they contaminate the entire batch.染料和杯盖也必须通过可堆肥认证,否则会污染整批堆肥。
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Landfill conditions lack oxygen, so these cups degrade slowly and release methane instead.填埋场缺氧,导致这类杯子降解缓慢并释放甲烷。
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Retailers using such cups often partner with local compost services to close the loop responsibly.使用此类杯子的零售商常与本地堆肥服务机构合作,以负责任地实现闭环循环。
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
- Special enzymes in industrial compost facilities break glycosidic bonds in the starch chains. 工业堆肥设施中的特殊酶会分解淀粉链中的糖苷键。
- Home compost bins rarely reach the 60°C+ needed for full breakdown within weeks. 家庭堆肥箱通常无法在几周内达到完全降解所需的60°C以上温度。
- Dyes and lids must also be certified compostable—or they contaminate the entire batch. 染料和杯盖也必须通过可堆肥认证,否则会污染整批堆肥。
④ 懂 · 选一选
⑤ 今天会说这一句
Special enzymes in industrial compost facilities break glycosidic bonds in the starch chains.
⑥ 跟读并录音
Special enzymes in industrial compost facilities break glycosidic bonds in the starch chains.
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:Special enzymes in industrial compost facilities break glycosidic bonds in the starch chains.
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。