Pronunciation scoring isn't supported on this browser — you can still record and listen back.
Atage44,XieQiupingcutherhairforthefirsttimeinover
Translating…
Turn on Record to capture your voice and get scored
Line 1/74
Summary
A TED-Ed lesson explaining the biology of hair growth — from follicles and matrix cells to why hair has a maximum length and what causes graying and baldness.
Present simple for scientific facts — Used throughout to state universal biological truths, e.g. "Follicles are tube-shaped structures nestled roughly half a centimeter below the skin's surface."
Relative clauses with 'which' — Add extra information about a noun mid-sentence without starting a new one, e.g. "…they form a strand of hair that emerges from the follicle and grows upwards." / "…scalp follicles, which grow at a rate of about 15 centimeters per year."
Conditional with 'even if' — Expresses that the result holds true regardless of the condition, e.g. "Even if you pluck hair out with your fingers or some wax, you'll likely only damage matrix cells, not fibroblasts."
'Can' for possibility vs. ability — Distinguishes what is biologically possible from what always happens, e.g. "…the average person's scalp hair could reach a maximum length of around one meter" vs. "…there are ways to take more control of our scalps."
About this video
This TED-Ed animation uses the remarkable case of Xie Qiuping — who holds the Guinness World Record for the world's longest hair at over five meters — as a springboard to explain the biology of hair growth. The video walks through exactly how hair forms inside a follicle: matrix cells divide, become trichocytes, fill with keratin proteins, and push upward as a strand. It then covers why different body hairs grow to different lengths (fibroblasts give region-specific instructions), how doctors exploit this for eyelash implants, why the average scalp can only grow hair to about one meter, and what causes both graying (loss of melanocyte stem cells) and baldness (loss of epithelial stem cells, sometimes accelerated by testosterone).
For shadowing practice, this video is excellent material. The narration is delivered at a measured, clear academic pace — neither too fast nor too slow — with a neutral, highly intelligible American English accent typical of TED-Ed productions. Sentences are complete and well-structured, and the speaker pauses naturally between ideas, giving learners time to catch up before repeating.
The video suits upper-intermediate to advanced learners (B2–C1). The vocabulary is science-specific but explained in context, so shadowers will build both scientific terminology and the kind of precise, logical English used in educational presentations. Learners will also practise connecting phrases ("however," "similarly," "for example") that make spoken explanations sound polished and coherent.
Idioms & expressions
get to the bottom of — to find the true explanation or cause of something; "To get to the bottom of this question, let's start at the bottom of a hair follicle."
change things up — to do something differently from the usual way; "…though they'll sometimes change things up."
given time — if enough time passes; "So given time, those hair bulbs will repair themselves and begin producing new hair."
run out of — to use up all of a supply so none remains; "…follicles run out of certain cell types, which can lead to changes in hair growth."
to begin with — used to emphasise that a quantity or situation was already small/limited at the start; "…since there are only a handful of melanocyte stem cells per follicle to begin with…"
a handful of — a very small number of; "…there are only a handful of melanocyte stem cells per follicle…"
shut down — to stop operating entirely; "…before eventually shutting down production altogether."
luscious locks — thick, attractive hair (alliterative phrase used as a light, positive closing image); "…you should be able to grow some luscious locks of your own."
