fifty的記憶方法:有five演變而來
例句
1、
Around fifty people die of hunger every day in the camp.
集中營裏每天大約有五十人餓死。
2、
To look at him you'd never think he was nearly fifty.
看他的外表,誰也想不到他年近五十了。
3、
He's ancient ─ he must be at least fifty!
他老得很了——肯定至少有五十歲!