1. Although he was born in a poor family he worked very hard. Eventually he founded his own company and became very successful.2. My mom didn't let her family down and gave birth to a baby boy. In Chinese tradition a boy is more desirable than a girl.3. When Rockets was down by two points, Jeremy caught the ball and made a three pointer and Rockets won the game. Jeremy did not fail us!
 successful not let someone down not fail someone爭氣或給力就是成功或不讓別人失望的意思，白話的翻出即可.
1. 雖然他出生於貧困家庭他非常爭氣. 後來成立自己的公司變得很成功.2. 我母親爭氣, 生了個兒子. (因為她家人希望她生兒子)