I've just revised my original post.
所有跟帖:
• Trial and error! (BTW,是這麽說嗎?我昨天剛學的:) -妖妖靈- ♀ (0 bytes) () 12/04/2022 postreply 10:44:35
• Thanks. I would say, "Tune it up." -renqiulan- ♂ (0 bytes) () 12/04/2022 postreply 12:07:00
• 謝謝,學習了,是精益求精的意思吧? -妖妖靈- ♀ (0 bytes) () 12/04/2022 postreply 12:14:41
• This idiom has much to do with musical instruments. -renqiulan- ♂ (0 bytes) () 12/04/2022 postreply 14:09:57