diff --git a/1000-hours/sounds-of-american-english/2.2.3-td.md b/1000-hours/sounds-of-american-english/2.2.3-td.md
index fbf86755..1d01ccf0 100644
--- a/1000-hours/sounds-of-american-english/2.2.3-td.md
+++ b/1000-hours/sounds-of-american-english/2.2.3-td.md
@@ -30,7 +30,7 @@ The t sound may be the most complex in American English
> * Standard t - This is the typical pronunciation, when t begins a stressed syllable, as in *take* teɪk.
> * 弹舌音 t̬ - 夹在两个元音中间的 t 会变成接近 d 的弹舌音 t̬，比如，*water* ˈwɑːt̬ɚ；
> * Flaping t̬: When t is situated between two vowels, it tends to be flaping t̬, sounding like d, as in water ˈwɑːt̬ɚ.
-> * 喉塞音 ʔ - m/n/l 之前的 t 有可能变成喉塞音 ʔ，比如，*utmost* ˈəʔˌmoʊst, *fitness* ˈfɪʔnəs, *witness* ˈwɪʔnəs, 或 *fruitless* ˈfruːtləs。如果你不知道喉塞音是什么样的，听听 *Uh-Oh!* —— ʌʔoʊ……
-> * Glottal Stop ʔ - The t before m/n/l might transform into a glottal stop, as in *utmost* ˈəʔˌmoʊst, *fitness* ˈfɪʔnəs, *witness* ˈwɪʔnəs, or *fruitless* ˈfruːtləs. If you don't understand what is a *glottal stop*, listen to the phrase, *Uh-Oh!* —— ʌʔoʊ...
+> * 喉塞音 ʔ - m/n/l 之前的 t 有可能变成喉塞音 ʔ，比如，*utmost* ˈʌʔˌmoʊst, *fitness* ˈfɪʔnəs, *witness* ˈwɪʔnəs, 或 *fruitless* ˈfruːtləs。如果你不知道喉塞音是什么样的，听听 *Uh-Oh!* —— ʌʔoʊ……
+> * Glottal Stop ʔ - The t before m/n/l might transform into a glottal stop, as in *utmost* ˈʌʔˌmoʊst, *fitness* ˈfɪʔnəs, *witness* ˈwɪʔnəs, or *fruitless* ˈfruːtləs. If you don't understand what is a *glottal stop*, listen to the phrase, *Uh-Oh!* —— ʌʔoʊ...
> * 省略音 ᵗ - n 之后的 t 可能会被省略掉，比如，*winter* ˈwɪnᵗər —— 当然，若是读成 ˈwɪntər也没错……
> * Optional ᵗ - The t following n might be omitted, as in *winter* ˈwɪnᵗər - of course, ˈwɪntəris also correct.
\ No newline at end of file