Oildag
石墨潤滑劑, 膠體石墨
??? 情景例句
How are you doing?
你好嗎？
Do flying saucers really exist?
飛碟真的存在嗎？
In England, too, spring is longer.Spring in England can last from late March to May.
英國的春天也較長，能夠從3月下旬延續到5月。