difficult problem
短語(yǔ)詞組
- a difficult technical problem 一個(gè)難題
- difficult point problem 難點(diǎn)問(wèn)題
- difficult technical problem 技術(shù)攻關(guān)
- difficult theoretical problem 理論難題
- solve the difficult maths problem 解決睏難的數(shù)學(xué)題
- solve a difficult technical problem 攻尅技術(shù)難關(guān)
- so the difficult technical problem 懸而未決的問(wèn)題
- Joseph Needham 's difficult cultural problem 李約瑟文化難題
- big and difficult problem 老大難;老大難” 返回 difficult problem