Backward flow problem
[计] 逆向流问题
🧩 词语组成解析
flow
[fləu]
vi. 流;垂;流出;（谈话、文体等）流畅;
n. 流动;滔滔不绝;涨潮;连贯;
vt. 使泛滥;淹没;排出;
🗣️ 情景例句
She was playing with the idea of studying abroad.
她有出国留学的念头，但并非很认真。
Believe somebody on his bare word.
人言无据，切勿轻信。
Oh, thank you! said Ann. Look at the nice paper. Can I open it now, or later?
“噢，谢谢你！”安说，“瞧这漂亮的纸。我现在开还是以后再开？”