4 sentences

1. 你要不要把外衣脱了？

   nǐ yào bù yào bǎ wài​yī tuō le?

   Would you like to take your coat off?

   Source: OpenSubtitles

2. 天热了，他脱了外衣坐下休息。

   tiān rè le, tā tuō le wài​yī zuò​xia xiū​xi.

   As it got hot, he took off his coat and sat down to rest.

   Source: Dong Chinese Dictionary

3. 这种植物的种子外面包着一层坚硬的外衣。

   zhè zhǒng zhí​wù de zhǒng​zi wài​miàn bāo zhe yī céng jiān​yìng de wài​yī.

   The seeds of this plant are covered by a hard outer coating.

   Source: Dong Chinese Dictionary

4. 这种行为披着慈善的外衣，实际上是在敛财。

   zhè zhǒng xíng​wéi pī zhe cí​shàn de wài​yī, shí​jì​shàng shì zài liǎn​cái.

   This behavior is done under the guise of charity, but it's actually about amassing wealth.

   Source: Dong Chinese Dictionary