diff --git a/1000-hours/sounds-of-american-english/3.2.12-tsdz.md b/1000-hours/sounds-of-american-english/3.2.12-tsdz.md
index 5d060acb..880172d4 100644
--- a/1000-hours/sounds-of-american-english/3.2.12-tsdz.md
+++ b/1000-hours/sounds-of-american-english/3.2.12-tsdz.md
@@ -8,4 +8,4 @@ The difference between `ts/dz` and `s/z` lies in the initial tongue position dur
 
 可以用 *students* `/ˈstudənts/` 这个词反复体会 `s`、`d`、`ts` 的舌尖位置（注意，开头的 `st` 会被读成 `sd`）……
 
-The word *students* `/ˈstudənts/` can be repeatedly pronounced to understand the tongue positions for `s`, `d`, and `ts` (note that the initial `st` is pronounced like `sd`).
\ No newline at end of file
+The word *students* `/ˈstudənts/` can be repeatedly pronounced to understand the tongue positions for `s`, `d`, and `ts` (note that the initial `st` is pronounced like `sd`).