kukoline

例句：

1. 1.The bitter taste of the medicine made him feel nauseous.
   药的苦味让他感到恶心。
2. 2.The bitterness of life is a constant reminder of our mortality.
   生活的苦涩是我们死亡的不断提醒。
3. 3. The bittersweet memories of childhood linger in my mind.
   童年的甜蜜与苦涩的回忆萦绕在我的心头。