You did an excellent job explaining the good points of smartphones, but you didn't talk about their bad points at all.
你出色地解释了智能手机的优点,但你根本没有谈论它们的缺点。
Praising the good points of others is itself a good point.
能称道别人的长处,这就是自已的长处。
The proverb means that we should acknowledge the good points of even those we dislike or disapprove of.
这条谚语是说,即使是我们所不喜欢或不赞成的人,我们也应承认人家的优点。
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