现在博物馆的维护人员在日常工作中也常带这种笔，以方便在需要修复的画作的画框上打个勾，作个标记。
Nowadays, museum maintenance staffs carried these markers on their daily rounds to place invisible "tick marks" on the frames of paintings that needed restoration.
总体上来说，这家博物馆给人的印象不错：这里有一些独一无二的机器。但它们的外观需要更多的良好维护。
Generally speaking the museum produces a good impression: there are some unique engines. But their appearance needs a little more of good keeping.
维护公共图书馆和博物馆是浪费钱，因为计算机技术是目前取代他们的角色。你在多大程度上同意或不同意。
Maintaining public libraries and museums is a waste of money because computer technology is now replacing their roles. To what extent do you agree or disagree?
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