40瓦的灯泡完全够亮了，并且不会晃眼。
A 40 watt bulb would be quite sufficient and would not obtrude.
我不确定现场回顾（Shore的评论里所提到的）是否就能足以完全够避免这些问题。
I’m not sure whether an on-site review [as suggested in Shore's writeup] is enough to guard against this completely.
发明一个电池动力车是一回事，让人觉得做够便宜并可以被说服出钱购买它完全是另一回事。
It is one thing to make a battery-powered car; quite another to make one sufficiently cheap and powerful for people to buy it.
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