5 sentences for 解开 (jiě​kāi — untie)

1. 这种连环扣很难解开。

   zhè zhǒng lián​huán kòu hěn nán jiě​kāi.

   This kind of puzzle ring is very hard to undo.

   Source: Dong Chinese Dictionary

2. 乱麻纠在一起，很难解开。

   luàn​má jiū zài yī​qǐ, hěn nán jiě​kāi.

   The tangled hemp is knotted together and hard to untie.

   Source: Dong Chinese Dictionary

3. 我忘记解开拖车了。

   wǒ wàng​jì jiě​kāi tuō​chē le.

   I forgot to unhook the trailer.

   Source: OpenSubtitles

4. 他解开了鞋带。

   tā jiě​kāi le xié​dài.

   He untied his shoelaces.

   Source: Dong Chinese Dictionary

5. 这些旧电线纠结在一起，很难解开。

   zhè​xiē jiù diàn​xiàn jiū​jié zài yī​qǐ, hěn nán jiě​kāi.

   These old wires are tangled together and hard to separate.

   Source: Dong Chinese Dictionary