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
You did a good job sewing this dress, I can see that you sewed the sections in the correct order.
你这条裙子做得不错，我看得出来你是按顺序来做缝纫的。
It's a long story.
说来话长。
The doctor's words made him feel comfortable.
医生的话让他感觉很舒服。