披沙拣金[ pī shā jiǎn jīn ]

⒈ 沙里淘金。比喻从大量的事物中选取精华。例虽古人糟粕，真伪相乱，而披沙拣金，有时获宝。——唐·刘知几《直书》英wash grains of gold out of the sand; (fig) get essentials from large mass of material;

⒉ 亦作“披沙沥金”

⒈ 见“披沙简金”。