D 开头单词

difficult-to-produce reserves [能源科学技术]难动用储量

difficult urination 小便不利

difficult to portray in words 难以形容

difficult to expectorate [医药科学]难出

difficult to be of help 无以为力

difficult thing 困难的事；难事

difficult swallowing [医药科学]吞咽困难

difficult problem 难题；难问题

difficult position and reform [经济学]困境与改革

difficult position 困境

difficult point 难点

difficult menstruation 月经困难

difficult ground 问题地区；特殊土地区；非凡土地区

difficult defecation [医药科学]排便困难

difficult choice 艰难的选择

difficult (adj.)

difficult adj.困难的；艰难的；(人)难对付的；不易相处的

difficile adj.(法语)困难的；固执的；难以相处的

differs vi.不同；有区别

differone 分化素