一般用英語怎么表達

　　Other amenities, less commonly available, include a library and exercise room

　　還有一些不太常有的設施，包括圖書館和健身房。

　　Grey-market perfumes and toiletries are now commonly sold by mail.

　　水貨香水和化妝品現在常常通過郵購方式售賣。

　　Obsessional personalities commonly ruminate excessively about death.

　　有強迫癥的人通常過多地思考死亡的問題。

　　Leagues are commonly made for mutual defense.

　　結成聯盟往往是為了共同防御。

　　When men are most sure and arrogant, they are commonly most mistaken.

　　人們過于自信和過于傲慢之時也正是他們最易犯錯之日。