餵一棵樹吸下放射性氣體,六天後聽見了地下的祕密?【慢科學EP9】

YouTube · PanSci · Native everyday · 2026/06/18
2026/06/18
Speech duration
31min 40s
Unique characters · 402 once
1,220
Word count
5,163
Average sentence length
12.7
Length
34:20
Unique words · 987 once
1,667
Syllables per minute
253
Script
Traditional 繁
Sentences
629
Difficulty
Beyond ranked vocabularydifficulty

Many of this content's words are outside our ranked vocabulary list — specialised terms or name-like words — so no level reaches 95% word coverage.

How difficulty works
Beyond ranked vocabulary

Many of this content's words are outside our ranked vocabulary list — specialised terms or name-like words — so no level reaches 95% word coverage.

TAGSNative everydayScience

Vocab coverage

The Level you need to know each share of this video’s words. The dark 95% step is its difficulty.

TOCFL coverage

Which TOCFL (TBCL) level each of this video’s words comes from.

  • TOCFL 1 32%
  • TOCFL 2 8%
  • TOCFL 3 4%
  • TOCFL 4 15%
  • TOCFL 5 10%
  • TOCFL 6 8%
  • TOCFL 7 2%
  • Not on TOCFL 21%

Cumulative: TOCFL 1–4 covers 59% of the words, TOCFL 1–6 covers 77%, TOCFL 1–7 covers 79%.

Words to learn first

Pick a level to see the words a learner there needs to understand 95% of this video’s words.

Starting from zero (Beginner), learn 1,401 words to reach 95% of this video’s words.

The 20 most-used of these 1,401 words.

WordPinyinMeaning (CC-CEDICT)In videoLevel
的deof; ~'s (possessive particle); (used after an attribute when it modifies a noun); (used at the end of a declarative sentence for emphasis); (used after a noun, verb or adjective to form a nominal expression, as in 皮革的[pi2 ge2 de5] "one made of leather" or 跑堂兒的|跑堂儿的[pao3 tang2 r5 de5] "a waiter (literally, one who runs back and forth in a restaurant)" or 新的[xin1 de5] "new one"); also pr. [di4] or [di5] in poetry and songs; really and truly; a taxi; a cab (abbr. for 的士[di1 shi4]); (bound form) bull's-eye; target454Lv 1
在zàito exist; to be alive; (of sb or sth) to be (located) at; (used before a verb to indicate an action in progress)104Lv 1
了le(completed action marker); (modal particle indicating change of state, situation now); (modal particle intensifying preceding clause); to finish; (used with 得[de2] or 不[bu4] after a verb to express (im)possibility, as in 忘不了[wang4 bu5 liao3] "cannot forget"); (literary) (usually followed by a negative such as 無|无[wu2] or 不[bu4]) completely (not); entirely (not); (not) in the least; (of eyes) bright; clear-sighted; to understand clearly; to understand clearly (variant of 瞭|了[liao3]); unofficial variant of 瞭[liao4]78Lv 1
她tāshe78Lv 1
一yīone; single; a (article); as soon as; entire; whole; all; throughout; "one" radical in Chinese characters (Kangxi radical 1); also pr. [yao1] for greater clarity when spelling out numbers digit by digit72Lv 1
與yǔand; to give; together with; to take part in; variant of 歟|欤[yu2]66Lv 5
是shìto be (followed by substantives only); correct; right; true; (respectful acknowledgement of a command) very well; (adverb for emphatic assertion); variant of 是[shi4]58Lv 1
不bùno; not so; (bound form) not; un-41Lv 1
被bèiquilt; to cover (with); (literary) to suffer (a misfortune); used to indicate passive voice (placed before the doer of the action like "by" in English passive-voice sentences, or, if the doer is not mentioned, before the verb); (since c. 2009) (sarcastic or jocular) used to indicate that the following word should be regarded as being in air quotes (as in 被旅遊|被旅游[bei4 lu : 3 you2] to "go on a trip")41Lv 1
森林sēn línforest; CL:片[pian4]37Lv 28

Is this video right for my Chinese?

A 34-minute video from PanSci with 32 minutes of speech at 253 syllables per minute. It's 5,163 words long, using 1,667 different words. Difficulty: Beyond ranked vocabulary — many of its words are outside our ranked vocabulary list, so no level reaches 95% word coverage. Words to learn first include 的, 在, 了.