至少在投影仪的灯泡爆了之前，幻灯片还不错。
At least the slides were good, that is, until the bulb in the projector blew.
用投影仪或者幻灯片来做陈述也许很快就会显得过时了。
Presentations with overhead projection or slides may soon look old-fashioned.
用投影仪或者幻灯片来做陈述也许很快就会显得过时了。
Presentations with overhead projection or slides may soon look old-fashioned.
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