4 sentences

1. 这种门窗是用铝合金制造的。

   zhè zhǒng mén​chuāng shì yòng lǚ​hé​jīn zhì​zào de.

   These doors and windows are made of aluminum alloy.

   Source: Dong Chinese Dictionary

2. 锁好门窗啊。

   suǒ hǎo mén​chuāng a.

   Lock your doors and windows.

   Source: OpenSubtitles

3. 他家因门窗未锁而导致财物失窃。

   tā jiā yīn mén​chuāng wèi suǒ ér dǎo​zhì cái​wù shī​qiè.

   His house was burglarized because the doors and windows were left unlocked.

   Source: Dong Chinese Dictionary

4. 离开房间时请关好门窗，注意防盗。

   lí​kāi fáng​jiān shí qǐng guān​hǎo mén​chuāng, zhù​yì fáng​dào.

   Please close the windows and doors when leaving the room and watch out for theft.

   Source: Dong Chinese Dictionary