upheaval 激動、大変動、extreme agitation or disorder, radical change 一般例文 a period of cultural and social upheavals 英字新聞からの例文 引用元 : Financial Times (by Shannon Bond) - NBC faces more change after year of upheaval (2017/12) …

sunk cost 埋没費用、cost that has already been incurred and cannot be recovered 一般例文 Car makers have enormous sunk costs in plants, processes and skills. 英字新聞からの例文 引用元 : Financial Times (by RICHARD WATERS) - Tech trends for…

deliberately 故意に、わざと、intentionally 一般例文 You did this deliberately, didn't you? Mike was deliberately ignoring the issue. 英字新聞からの例文 引用元 : Financial Times (by Hannah Kuchler) - Apple apologises for slower iPhones afte…