These complex formulae are beyond the grasp of the average pupil.
这些复杂的公式是一般小学生不能理解的。
《牛津词典》
2
We should proceed in an orderly way, advance step by step in our studies, and not reach for what is beyond our grasp.
我们在学习上应当循序渐进，不能好高骛远。
3
Even today, many otherwise educated men-like those savages who can count to three but lump together all Numbers beyond four-cannot grasp the profound distinction between solar and stellar space.