难以想象: beyond imagination, be difficult to imagine...
笔记本: notebook (stationery), notebook (computing)...
平面: plane (flat surface), print media...
皆: all, each and every, in all cases...
天经地义: heaven's law and earth's principle (idiom); right and proper, right and unalterable, a matter of course...
债: debt...
危急: critical, desperate (situation)...
协同: to cooperate, in coordination with, coordinated, collaborate, collaboration, collaborative...
必不可少: absolutely necessary, indispensable, essential...
学生: student, schoolchild...
