to return a purchased item for a refund or replacement
退还购买的物品以获得退款或更换 (tuìhuán gòumǎi de wùpǐn yǐ huòqǔ tuìkuǎn huò gēnghuàn)
"I had to send back the shirt because it didn’t fit."
"我不得不退还那件衬衫，因为它不合身。" (Wǒ bùdébù **tuìhuán** nà jiàn chènshān, yīnwèi tā bù héshēn.)
to support or defend each other in a group
to use past successes as a foundation for further progress
to make someone feel sad; to move to a lower position
to drink enough water to keep your body healthy
to become so excited that you lose control of your feelings
to stay calm and rational during emotional situations
