2 sentences

1. 你可以通过设置热键来提高操作速度。

   nǐ kě​yǐ tōng​guò shè​zhì rè​jiàn lái tí​gāo cāo​zuò sù​dù.

   You can increase your operation speed by setting up hotkeys.

   Source: Dong Chinese Dictionary

2. 当电脑系统失去响应时，用户可以通过按下开机热键来尝试重启。

   dāng diàn​nǎo xì​tǒng shī​qù xiǎng​yìng shí, yòng​hù kě​yǐ tōng​guò àn​xià kāi​jī rè​jiàn lái cháng​shì chóng​qǐ.

   When the computer system stops responding, users can try to restart it by pressing the power hotkey.

   Source: Dong Chinese Dictionary