3 sentences

1. 这种细胞薄膜具有半透性。

   zhè zhǒng xì​bāo bó​mó jù​yǒu bàn tòu xìng.

   This cell membrane is semi-permeable.

   Source: Dong Chinese Dictionary

2. 腹膜是覆盖腹腔内壁和器官的一层薄膜。

   fù​mó shì fù​gài fù​qiāng nèi bì hé qì​guān de yī céng bó​mó.

   The peritoneum is a thin membrane that lines the abdominal cavity and covers the organs.

   Source: Dong Chinese Dictionary

3. 这种塑料薄膜常用于食品包装。

   zhè zhǒng sù​liào bó​mó cháng​yòng yú shí​pǐn bāo​zhuāng.

   This plastic film is often used for food packaging.

   Source: Dong Chinese Dictionary