如何使用 "apropos" 造句

1. Apropos of what you were just saying .
关于你刚才所说的话.
2. Apropos what you said yesterday , I think you were right .
关于你昨天所说的话,我想你是对的。
3. Apropos , do you find the new radio set satisfactory ?
顺便问一声,你对那新的收音机满意吗?
4. You 'll find the last paragraph extremely apropos .
你会觉得最后一段文字极为中肯。
5. Apropos your brother , I 'll front him later .
至于你哥哥,我以后再对付他。