?? 詞語組成解析
fast
[f?st]
adj. 快的;走得快;感光快的;緊的;
adv. （比準確的時間或宣布的時間）快;迅速地;緊緊地;徹底地;
vi. 禁食，（尤指）齋戒;
n. 禁食期，齋戒期;斷食，節(jié)食;
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
prep. 從, 自\\n[計] 地址總線
??? 情景例句
It's not difficult.
這不難。
To err is human; to forgive, divine.
人難免錯誤，寬恕別人是神圣的。
He described it as 'a very agreeable situation located within two small hills in the midst of which flowed a great river.
“地理位置十分適宜，位于兩座小山的中間，一條大河從中間流過”。