1. touchstone n. 試金石;(檢驗)標準 SYN: standard/criteria
2. for sake 為了…的緣故
eg. Just for sake of argument, we'll assume it's about there, and I do the same thing.
為了方便起見,我們假定就在這里,重復之前做的。
3. be proud of 為…驕傲
eg. We all have much to be proud of.
我們都有很多值得自豪的東西。