back 有一個(gè)意思是“if musicians back a singer or another musician,they play music that makes the main performer sound better”。誰能用這個(gè)意思造一個(gè)地道句子？

熱心網(wǎng)友

I mess up this computer,I cant back up!!!

熱心網(wǎng)友

don't worry, I will you back you forever.here back means to support somebody.