困难的事用英语怎么说？

困难的事

例句

• Only those who have the patience to do simple things perfectly ever acquire the skill to do difficult things easily. 只有有耐心圆满完成简单工作的人，才能够轻而易举的完成困难的事。 ——Friedrich Schiller德国剧作家诗人席勒
• Striking a balance between health and convenience can be a tall order to many nine - to - fivers. 在健康与方便性中间取得平衡点对许多上班族来说是困难的事.
• Truly none was so fit to set about this herculean labour as Petruchio. 这样困难的事除了彼特鲁乔以外确实找不到更合适的人来办了.
• It is the most difficult of all anthropological data on which to " draw " the old Negro. 在所有的人类学资料中,最困难的事莫过于 “ 刻划 ” 古代的黑人.