5 sentences

1. 保持核心肌肉收紧。

   bǎo​chí hé​xīn jī​ròu shōu jǐn.

   Keep the core muscles tight.

   Source: CCMatrix

2. 她眼睛周围的皮肤收紧了。

   tā yǎn​jing zhōu​wéi de pí​fū shōu jǐn le.

   The skin around her eyes tightened.

   Source: CCMatrix

3. 她的嘴唇收紧了，但她没有回答。

   tā de zuǐ​chún shōu jǐn le, dàn tā méi​yǒu huí​dá.

   Her lips tightened but she didn’t reply.

   Source: CCMatrix

4. 你的肌肉会收紧，你会失去活动能力。

   nǐ de jī​ròu huì shōu jǐn, nǐ huì shī​qù huó​dòng​néng​lì.

   Your muscles will tighten and you’ll lose mobility.

   Source: CCMatrix

5. 要是裙子太大了，我们可以把腰部收紧一些。

   yào​shi qún​zi tài dà le, wǒ​men kě​yǐ bǎ yāo​bù shōu jǐn yī​xiē.

   If the skirt is too big, we can take in the waist.

   Source: UM-Corpus: Spoken