approximation
noun [ C ] formal uk/əˌprɒk.sɪˈmeɪ.ʃən/ us/əˌprɑːk.səˈmeɪ.ʃən/
粗略估计;近似值
a guess of a number that is not exact but that is close
Could you give me a rough approximation of how many people will be coming? 你能告诉我要来的大概人数吗？
What he said bore no approximation whatsoever to the truth (= was not at all like the truth). 他的说法跟实际情况风马牛不相及。