Facebook members also use that site more frequently .

facebook的会员使用其网站也更频繁。

Safeguard your passwords and change them frequently .

经常保护和更改你的密码。

American banks frequently did not require down payments .

美国的银行常常不要求首付。

Latent conflicts in africa frequently flare up at such times .

非洲那些潜在的冲突往往在这些时候爆发出来。

Buy frequently used items in bulk .

批量购买经常使用的物品。