那么，为什么艺术仍被广泛认为是学校里的“简单科目”，对更广泛的社会来说无足轻重，是对时间和精力的浪费？
Why, then, is art still so widely considered to be "the easy subject" at school, insignificant to wider society, a waste of time and effort?
这真是时间和精力的浪费，徒劳无益。
缺乏事先规划，仅此一点就可能造成大量时间和精力的浪费。
A great deal of time and energy can be wasted through simple lack of planning.
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