R and d program
[经] 研究与发展, 开发规划
🧩 词语组成解析
and
[ənd, ən,ænd]
conj. 和，与;而且;于是，然后;因此;
🗣️ 情景例句
I would like to open a savings account.
我想开个现金户头。
In the crowd, Sam looked aside to avoid seeing her.
在人潮中，萨姆把头转向旁边，免得和她目光相对。
Well, I can't leave before nine. I have a lot of work to do.
嗯，我9：00以前离不开。我有很多作业要做。