3 sentences

1. 请按键输入您的支付密码。

   qǐng àn​jiàn shū​rù nín de zhī​fù mì​mǎ.

   Please use the keys to enter your payment password.

   Source: Dong Chinese Dictionary

2. 系统记录了用户的每一次按键。

   xì​tǒng jì​lù le yòng​hù de měi yī cì àn​jiàn.

   The system recorded every keystroke made by the user.

   Source: Dong Chinese Dictionary

3. 这个遥控器的按键太小，不太好按。

   zhè gè yáo​kòng​qì de àn​jiàn tài xiǎo, bù tài hǎo àn.

   The buttons on this remote control are too small and hard to press.

   Source: Dong Chinese Dictionary