Stepwise refinement
[計] 逐步求精
?? 詞語組成解析
a. 樓梯式的, 逐步的
refinement
[ri'fainm?nt]
n. 精煉，提純，凈化;改良品;細微的改良，極致;優雅，高貴的動作;
??? 情景例句
When you have a business meeting in the United States, come to the appointment on time.
當你在美國有商務會晤時，一定要按時赴約。
Well, to tell the truth, I was a little disappointed.
說實話，我有點失望。
No one could account for the fact that one of the boxes was extremely heavy.
其中有只箱子特別重，可誰也弄不清是怎么回事。