名 bottom，base，the heart of a matter，ins and outs；动 [书] （达到） end up with，come to；代 what，this，so，such ；

[例句] 金矿并非无底的宝藏，金子终究会被采光。 A gold mine is not a bottomless pit, the gold runs out.

[例句] 艾森豪威尔离开白宫，退隐到他在葛底斯堡的农场。 Eisenhower left the White House and retired to his farm in Gettysburg.