Grade of oil
[經] 石油品級
?? 詞語組成解析
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];
oil
[??l]
n. 油;石油;油畫;燃油;
vt. 給…加油;
vi. 化成油;
??? 情景例句
and there is room,
這里有地方，
Our clients want a replacement.
我們的客戶要求換貨。
She was not especially pretty. But she was extremely bright.
她不是特別漂亮，但她極聰明。