英譯：
(throw) a sprat to catch a mackerel/whale
例句：
The policy aims mainly to throw a sprat to catch a mackerel. (這項政策旨在拋磚引玉)
Every week I invest one hundred NT dollars on the lottery tickets. It's a sprat to catch a mackerel because one day I could win one hundred million. (我每個禮拜都花一百元買樂透彩，這完全是一種小冒險求大利的行動，因為有一天我可能會中1億元)
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