Could I just say in passing that … ?

我能顺便说一下…吗？

Apropos , I have something to tell you.

顺便, 我有点说。

I like ramble about the street after work,and buy something passingly.

我喜欢下班后乱逛，顺便买点东西。

They dropped in for a chat last night.

他们昨晚顺便来闲聊了一会儿。

Incidentally, I think you still owe me some money.

顺便说一句, 我想还欠我一些钱。

I had a long chat with her when I went by her house this morning.

今天早上我顺便去她家看她, 同她谈了好一会儿。

He dropped into the garden.

他顺便去花园。

He edged in a word.

他顺便插进一句话。

Apropos, where were you yesterday?

顺便问一句，昨天在哪儿?

I paid my seven-fifty, had my gumboots ready, shoved my digital camera into my school bag and made sure everything is ready.

不过还要花二十块钱买一双胶靴。顺便还带了老妈相机。

"Send my letters under cover to my grandpapa, the Earl of Dexter," said Miss Saltire (who, by the way, was rather shabby).

赛尔泰小姐（顺便告诉一声，她穿得很寒酸）说道：“写给我信，叫我祖父台克斯脱勋爵转给我得了。”

I had a meeting with Graham at work today … by the way, I’ve invited him and his wife to lunch on Sunday.

今天上班， 我会见了格雷厄姆…顺便提一下，我已经邀请他和他夫人周日吃午餐。

By the way, the music at this event was played by a man with a cittern, who not only performed with virtuosity, but also with a sense of humour.

顺便说一句，活动音乐是被人用西特琴演奏，不仅很艺术，而且感觉上有些幽默。