3 sentences

1. 把腰带煞紧一点儿。

   bǎ yāo​dài shā​jǐn yì​diǎn'ér.

   Tighten the belt a bit more.

   Source: Dong Chinese Dictionary

2. 他系上了腰带。

   tā jì​shang le yāo​dài.

   He fastened his belt.

   Source: Dong Chinese Dictionary

3. 腰带太紧了。

   yāo​dài tài jǐn le.

   The belt is too tight.

   Source: OpenSubtitles