royal road 捷径；坦途；康庄大道

【例句】
There is no royal road to science , and only those who don't dread the fatiguing climb of gaining it's numinous summits.
科学没有坦途，只有那些不畏疲劳勇于攀登的人才能到达精神的顶峰。

While there is no cure-all in medical field, there is no royal road to learning.
在医学领域没有包治百病的灵丹妙药，学习也没有坦途。