a good Samaritan
US /ə ɡʊd səˈmær.ɪ.tən/
UK /ə ɡʊd səˈmær.ɪ.tən/

1.
好心人, 樂於助人者
a person who helps other people, especially strangers, in a difficult situation
:
•
A good Samaritan stopped to help the stranded motorist change a flat tire.
一位好心人停下來幫助被困的司機更換爆胎。
•
The old woman thanked the good Samaritan who returned her lost wallet.
老婦人感謝那位歸還她丟失錢包的好心人。