Orsi
abbr. Operations Research Society of India 印度运筹学学会
🗣️ 情景例句
Thank you. I'd very much like to have a cup of Chinese tea.
我想来杯中国茶，谢谢你。
May I come in?
我能进来吗？
'It's a waste of time.
“这是浪费时间。