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Why Wounds Form Scabs During Healing
为什么伤口愈合会结痂
精读先不看文字,完整听一遍。
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When your skin gets cut, blood flows out and begins to clot almost instantly.皮肤被划伤时,血液会立即流出并开始凝结。
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Platelets in the blood stick together and form a temporary plug at the wound site.血液中的血小板聚集在一起,在伤口处形成临时堵塞。
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Fibrin proteins then weave a mesh-like net to strengthen this clot further.纤维蛋白随后编织成网状结构,进一步加固血凝块。
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As the clot dries and hardens in air, it turns into a protective brownish scab.血凝块在空气中变干变硬,形成一层起保护作用的褐色痂皮。
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This scab shields new skin cells growing underneath from germs and friction.这层痂皮保护下方新生的皮肤细胞免受细菌和摩擦伤害。
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White blood cells also gather beneath it to fight off any invading bacteria.白细胞也会聚集在痂皮下方,抵御入侵的细菌。
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Once healing is complete, the scab naturally loosens and falls off.待愈合完成后,痂皮自然松动脱落。
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Scab formation is a vital first step in the body’s natural repair process.结痂是人体自然修复过程中的关键第一步。
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Without it, wounds would stay open longer and risk serious infection.若无此过程,伤口将长时间敞开,增加严重感染风险。
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Even small scrapes follow this same biological sequence every time.即便是轻微擦伤,每次都会遵循这一相同的生物学过程。
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
- Even small scrapes follow this same biological sequence every time. 即便是轻微擦伤,每次都会遵循这一相同的生物学过程。
- Once healing is complete, the scab naturally loosens and falls off. 待愈合完成后,痂皮自然松动脱落。
- Without it, wounds would stay open longer and risk serious infection. 若无此过程,伤口将长时间敞开,增加严重感染风险。
④ 懂 · 选一选
⑤ 今天会说这一句
Even small scrapes follow this same biological sequence every time.
⑥ 跟读并录音
Even small scrapes follow this same biological sequence every time.
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:Even small scrapes follow this same biological sequence every time.
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。