Oil conservation
石油資源保護
?? 詞語組成解析
oil
[??l]
n. 油;石油;油畫;燃油;
vt. 給…加油;
vi. 化成油;
??? 情景例句
He keeps himself fit by running 5 miles every day.
他每天跑五公里以保持身體健康。
Never too old (or late) to learn.
學到老，學不了。
His looks are always funny.
他的樣子總是滑稽可笑。