學個詞 Learn A Word:505 rule of thumb

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今天我們要學的詞是rule of thumb。 Rule of thumb, 經(jīng)過反復實踐，得出的一般規(guī)律。一項最新研究指出，少吃能長壽。 "The rule of thumb is that by eating 15 % less starting at age 25 you could add 4.5 years to your life," 一般規(guī)律是，如果你從25歲開始，飯量減少15%，就能多活四年半。

如今油價飛漲，省油的高招之一是： "As a rule of thumb, shut off your engine if you expect to be sitting for more than 30 seconds," 一般來說，如果停車超過半分鐘，就應(yīng)該熄滅引擎。好，今天我們學習的詞是rule of thumb...